diff --git a/packages/next/src/build/webpack/loaders/next-app-loader.ts b/packages/next/src/build/webpack/loaders/next-app-loader.ts
index 3fdf6b4633384..db6e4111dd8b4 100644
--- a/packages/next/src/build/webpack/loaders/next-app-loader.ts
+++ b/packages/next/src/build/webpack/loaders/next-app-loader.ts
@@ -58,6 +58,7 @@ type AppLoader = webpack.LoaderDefinitionFunction<AppLoaderOptions>
 const UI_FILE_TYPES = {
   'not-found': 'not-found',
   forbidden: 'forbidden',
+  unauthorized: 'unauthorized',
 } as const
 
 const FILE_TYPES = {
@@ -75,6 +76,7 @@ const PARALLEL_CHILDREN_SEGMENT = 'children$'
 const defaultUIErrorPaths: { [k in keyof typeof UI_FILE_TYPES]: string } = {
   'not-found': 'next/dist/client/components/not-found-error',
   forbidden: 'next/dist/client/components/forbidden-error',
+  unauthorized: 'next/dist/client/components/unauthorized-error',
 }
 
 const defaultGlobalErrorPath = 'next/dist/client/components/error-boundary'
diff --git a/packages/next/src/client/components/dev-root-not-found-boundary.tsx b/packages/next/src/client/components/dev-root-not-found-boundary.tsx
index 4ef0588560ef2..22442875eac21 100644
--- a/packages/next/src/client/components/dev-root-not-found-boundary.tsx
+++ b/packages/next/src/client/components/dev-root-not-found-boundary.tsx
@@ -1,7 +1,11 @@
 'use client'
 
 import React from 'react'
-import { ForbiddenBoundary, NotFoundBoundary } from './ui-errors-boundaries'
+import {
+  ForbiddenBoundary,
+  NotFoundBoundary,
+  UnauthorizedBoundary,
+} from './ui-errors-boundaries'
 import type { UIErrorHelper } from '../../shared/lib/ui-error-types'
 
 export function bailOnUIError(uiError: UIErrorHelper) {
@@ -18,16 +22,23 @@ function NotAllowedRootForbiddenError() {
   return null
 }
 
+function NotAllowedRootUnauthorizedError() {
+  bailOnUIError('unauthorized')
+  return null
+}
+
 export function DevRootUIErrorsBoundary({
   children,
 }: {
   children: React.ReactNode
 }) {
   return (
-    <ForbiddenBoundary uiComponent={<NotAllowedRootForbiddenError />}>
-      <NotFoundBoundary uiComponent={<NotAllowedRootNotFoundError />}>
-        {children}
-      </NotFoundBoundary>
-    </ForbiddenBoundary>
+    <UnauthorizedBoundary uiComponent={<NotAllowedRootUnauthorizedError />}>
+      <ForbiddenBoundary uiComponent={<NotAllowedRootForbiddenError />}>
+        <NotFoundBoundary uiComponent={<NotAllowedRootNotFoundError />}>
+          {children}
+        </NotFoundBoundary>
+      </ForbiddenBoundary>
+    </UnauthorizedBoundary>
   )
 }
diff --git a/packages/next/src/client/components/is-next-router-error.ts b/packages/next/src/client/components/is-next-router-error.ts
index 865d24b8cb63b..c5cac84cdcccb 100644
--- a/packages/next/src/client/components/is-next-router-error.ts
+++ b/packages/next/src/client/components/is-next-router-error.ts
@@ -1,6 +1,7 @@
 import { isNotFoundError } from './not-found'
 import { isRedirectError } from './redirect'
 import { isForbiddenError } from './forbidden'
+import { isUnauthorizedError } from './unauthorized'
 
 export function isNextRouterError(error: any): boolean {
   return (
@@ -8,6 +9,7 @@ export function isNextRouterError(error: any): boolean {
     error.digest &&
     (isRedirectError(error) ||
       isNotFoundError(error) ||
-      isForbiddenError(error))
+      isForbiddenError(error) ||
+      isUnauthorizedError(error))
   )
 }
diff --git a/packages/next/src/client/components/layout-router.tsx b/packages/next/src/client/components/layout-router.tsx
index 7b17e3c313ec5..900e622a22b92 100644
--- a/packages/next/src/client/components/layout-router.tsx
+++ b/packages/next/src/client/components/layout-router.tsx
@@ -34,7 +34,11 @@ import { RedirectBoundary } from './redirect-boundary'
 import { getSegmentValue } from './router-reducer/reducers/get-segment-value'
 import { createRouterCacheKey } from './router-reducer/create-router-cache-key'
 import { hasInterceptionRouteInCurrentTree } from './router-reducer/reducers/has-interception-route-in-current-tree'
-import { ForbiddenBoundary, NotFoundBoundary } from './ui-errors-boundaries'
+import {
+  ForbiddenBoundary,
+  NotFoundBoundary,
+  UnauthorizedBoundary,
+} from './ui-errors-boundaries'
 
 /**
  * Add refetch marker to router state at the point of the current layout segment.
@@ -527,6 +531,8 @@ export default function OuterLayoutRouter({
   notFoundStyles,
   forbidden,
   forbiddenStyles,
+  unauthorized,
+  unauthorizedStyles,
   styles,
 }: {
   parallelRouterKey: string
@@ -541,6 +547,8 @@ export default function OuterLayoutRouter({
   notFoundStyles: React.ReactNode | undefined
   forbidden: React.ReactNode | undefined
   forbiddenStyles: React.ReactNode | undefined
+  unauthorized: React.ReactNode | undefined
+  unauthorizedStyles: React.ReactNode | undefined
   styles?: React.ReactNode
 }) {
   const context = useContext(LayoutRouterContext)
@@ -604,29 +612,35 @@ export default function OuterLayoutRouter({
                     loadingStyles={loading?.[1]}
                     loadingScripts={loading?.[2]}
                   >
-                    <ForbiddenBoundary
-                      uiComponent={forbidden}
-                      uiComponentStyles={forbiddenStyles}
+                    <UnauthorizedBoundary
+                      uiComponent={unauthorized}
+                      uiComponentStyles={unauthorizedStyles}
                     >
-                      <NotFoundBoundary
-                        uiComponent={notFound}
-                        uiComponentStyles={notFoundStyles}
+                      <ForbiddenBoundary
+                        uiComponent={forbidden}
+                        uiComponentStyles={forbiddenStyles}
                       >
-                        <RedirectBoundary>
-                          <InnerLayoutRouter
-                            parallelRouterKey={parallelRouterKey}
-                            url={url}
-                            tree={tree}
-                            childNodes={childNodesForParallelRouter!}
-                            segmentPath={segmentPath}
-                            cacheKey={cacheKey}
-                            isActive={
-                              currentChildSegmentValue === preservedSegmentValue
-                            }
-                          />
-                        </RedirectBoundary>
-                      </NotFoundBoundary>
-                    </ForbiddenBoundary>
+                        <NotFoundBoundary
+                          uiComponent={notFound}
+                          uiComponentStyles={notFoundStyles}
+                        >
+                          <RedirectBoundary>
+                            <InnerLayoutRouter
+                              parallelRouterKey={parallelRouterKey}
+                              url={url}
+                              tree={tree}
+                              childNodes={childNodesForParallelRouter!}
+                              segmentPath={segmentPath}
+                              cacheKey={cacheKey}
+                              isActive={
+                                currentChildSegmentValue ===
+                                preservedSegmentValue
+                              }
+                            />
+                          </RedirectBoundary>
+                        </NotFoundBoundary>
+                      </ForbiddenBoundary>
+                    </UnauthorizedBoundary>
                   </LoadingBoundary>
                 </ErrorBoundary>
               </ScrollAndFocusHandler>
diff --git a/packages/next/src/client/components/navigation.react-server.ts b/packages/next/src/client/components/navigation.react-server.ts
index 32aa4ffb3b12c..bd38a357ec5a3 100644
--- a/packages/next/src/client/components/navigation.react-server.ts
+++ b/packages/next/src/client/components/navigation.react-server.ts
@@ -29,4 +29,5 @@ class ReadonlyURLSearchParams extends URLSearchParams {
 export { redirect, permanentRedirect, RedirectType } from './redirect'
 export { notFound } from './not-found'
 export { forbidden } from './forbidden'
+export { unauthorized } from './unauthorized'
 export { ReadonlyURLSearchParams }
diff --git a/packages/next/src/client/components/navigation.ts b/packages/next/src/client/components/navigation.ts
index a3394ea0229f6..8e0d44d7baa1f 100644
--- a/packages/next/src/client/components/navigation.ts
+++ b/packages/next/src/client/components/navigation.ts
@@ -266,6 +266,7 @@ export {
 export {
   notFound,
   forbidden,
+  unauthorized,
   redirect,
   permanentRedirect,
   RedirectType,
diff --git a/packages/next/src/client/components/ui-errors-boundaries.tsx b/packages/next/src/client/components/ui-errors-boundaries.tsx
index a2d7c2a3936a4..76de8498fc6de 100644
--- a/packages/next/src/client/components/ui-errors-boundaries.tsx
+++ b/packages/next/src/client/components/ui-errors-boundaries.tsx
@@ -8,6 +8,7 @@ import {
 } from './ui-error-boundary'
 import { isForbiddenError } from './forbidden'
 import { isNotFoundError } from './not-found'
+import { isUnauthorizedError } from './unauthorized'
 
 type BoundaryConsumerProps = Pick<
   UIErrorBoundaryWrapperProps,
@@ -33,3 +34,18 @@ export function NotFoundBoundary(props: BoundaryConsumerProps) {
     />
   )
 }
+
+type UnauthorizedBoundaryProps = Pick<
+  UIErrorBoundaryWrapperProps,
+  'uiComponent' | 'uiComponentStyles' | 'children'
+>
+
+export function UnauthorizedBoundary(props: UnauthorizedBoundaryProps) {
+  return (
+    <UIErrorBoundaryWrapper
+      nextError={'unauthorized'}
+      matcher={isUnauthorizedError}
+      {...props}
+    />
+  )
+}
diff --git a/packages/next/src/client/components/unauthorized-error.tsx b/packages/next/src/client/components/unauthorized-error.tsx
new file mode 100644
index 0000000000000..8b49131ee796a
--- /dev/null
+++ b/packages/next/src/client/components/unauthorized-error.tsx
@@ -0,0 +1,11 @@
+import { UIErrorTemplate } from './ui-error-template'
+
+export default function Unauthorized() {
+  return (
+    <UIErrorTemplate
+      pageTitle="401: Unauthorized Access to this page."
+      title="401"
+      subtitle="Unauthorized Access to this page."
+    />
+  )
+}
diff --git a/packages/next/src/client/components/unauthorized.ts b/packages/next/src/client/components/unauthorized.ts
new file mode 100644
index 0000000000000..4232dc94232dd
--- /dev/null
+++ b/packages/next/src/client/components/unauthorized.ts
@@ -0,0 +1,11 @@
+import { createUIError } from './ui-error-builder'
+
+const { thrower, matcher } = createUIError('NEXT_UNAUTHORIZED')
+
+// TODO(@panteliselef): Update docs
+const unauthorized = thrower
+
+// TODO(@panteliselef): Update docs
+const isUnauthorizedError = matcher
+
+export { unauthorized, isUnauthorizedError }
diff --git a/packages/next/src/export/helpers/is-navigation-signal-error.ts b/packages/next/src/export/helpers/is-navigation-signal-error.ts
index f67bf8f575735..e705d71f687bf 100644
--- a/packages/next/src/export/helpers/is-navigation-signal-error.ts
+++ b/packages/next/src/export/helpers/is-navigation-signal-error.ts
@@ -1,6 +1,7 @@
 import { isNotFoundError } from '../../client/components/not-found'
 import { isRedirectError } from '../../client/components/redirect'
 import { isForbiddenError } from '../../client/components/forbidden'
+import { isUnauthorizedError } from '../../client/components/unauthorized'
 
 /**
  * Returns true if the error is a navigation signal error. These errors are
@@ -8,4 +9,7 @@ import { isForbiddenError } from '../../client/components/forbidden'
  * render.
  */
 export const isNavigationSignalError = (err: unknown) =>
-  isNotFoundError(err) || isRedirectError(err) || isForbiddenError(err)
+  isNotFoundError(err) ||
+  isRedirectError(err) ||
+  isForbiddenError(err) ||
+  isUnauthorizedError(err)
diff --git a/packages/next/src/server/app-render/create-component-tree.tsx b/packages/next/src/server/app-render/create-component-tree.tsx
index cb0beb441554c..aec159eed653a 100644
--- a/packages/next/src/server/app-render/create-component-tree.tsx
+++ b/packages/next/src/server/app-render/create-component-tree.tsx
@@ -15,6 +15,7 @@ import { getTracer } from '../lib/trace/tracer'
 import { NextNodeServerSpan } from '../lib/trace/constants'
 import { StaticGenBailoutError } from '../../client/components/static-generation-bailout'
 import type { LoadingModuleData } from '../../shared/lib/app-router-context.shared-runtime'
+import { UnauthorizedBoundary } from '../../client/components/ui-errors-boundaries'
 
 type ComponentTree = {
   seedData: CacheNodeSeedData
@@ -108,6 +109,7 @@ async function createComponentTreeInternal({
     loading,
     'not-found': notFound,
     forbidden,
+    unauthorized,
   } = components
 
   const injectedCSSWithCurrentLayout = new Set(injectedCSS)
@@ -198,6 +200,16 @@ async function createComponentTreeInternal({
       })
     : []
 
+  const [Unauthorized, unauthorizedStyles] = unauthorized
+    ? await createComponentStylesAndScripts({
+        ctx,
+        filePath: unauthorized[1],
+        getComponent: unauthorized[0],
+        injectedCSS: injectedCSSWithCurrentLayout,
+        injectedJS: injectedJSWithCurrentLayout,
+      })
+    : []
+
   let dynamic = layoutOrPageMod?.dynamic
 
   if (nextConfigOutput === 'export') {
@@ -302,48 +314,64 @@ async function createComponentTreeInternal({
     Component = (componentProps: { params: Params }) => {
       const NotFoundComponent = NotFound
       const ForbiddenComponent = Forbidden
+      const UnauthorizedComponent = Unauthorized
       const RootLayoutComponent = LayoutOrPage
-      const RoolLayoutBoundaryComponent = () => {
-        return
-      }
       return (
-        <ForbiddenBoundary
+        <UnauthorizedBoundary
           uiComponent={
-            ForbiddenComponent ? (
+            UnauthorizedComponent ? (
               <>
                 {layerAssets}
                 {/*
                  * We are intentionally only forwarding params to the root layout, as passing any of the parallel route props
-                 * might trigger `forbidden()`, which is not currently supported in the root layout.
+                 * might trigger `unauthorized()`, which is not currently supported in the root layout.
                  */}
                 <RootLayoutComponent params={componentProps.params}>
-                  {forbiddenStyles}
-                  <ForbiddenComponent />
+                  {unauthorizedStyles}
+                  <UnauthorizedComponent />
                 </RootLayoutComponent>
               </>
             ) : undefined
           }
         >
-          <NotFoundBoundary
+          <ForbiddenBoundary
             uiComponent={
-              NotFoundComponent ? (
+              ForbiddenComponent ? (
                 <>
                   {layerAssets}
                   {/*
                    * We are intentionally only forwarding params to the root layout, as passing any of the parallel route props
-                   * might trigger `notFound()`, which is not currently supported in the root layout.
+                   * might trigger `forbidden()`, which is not currently supported in the root layout.
                    */}
                   <RootLayoutComponent params={componentProps.params}>
-                    {notFoundStyles}
-                    <NotFoundComponent />
+                    {forbiddenStyles}
+                    <ForbiddenComponent />
                   </RootLayoutComponent>
                 </>
               ) : undefined
             }
           >
-            <RootLayoutComponent {...componentProps} />
-          </NotFoundBoundary>
-        </ForbiddenBoundary>
+            <NotFoundBoundary
+              uiComponent={
+                NotFoundComponent ? (
+                  <>
+                    {layerAssets}
+                    {/*
+                     * We are intentionally only forwarding params to the root layout, as passing any of the parallel route props
+                     * might trigger `notFound()`, which is not currently supported in the root layout.
+                     */}
+                    <RootLayoutComponent params={componentProps.params}>
+                      {notFoundStyles}
+                      <NotFoundComponent />
+                    </RootLayoutComponent>
+                  </>
+                ) : undefined
+              }
+            >
+              <RootLayoutComponent {...componentProps} />
+            </NotFoundBoundary>
+          </ForbiddenBoundary>
+        </UnauthorizedBoundary>
       )
     }
   }
@@ -385,6 +413,15 @@ async function createComponentTreeInternal({
         `The default export of forbidden is not a React Component in ${segment}`
       )
     }
+
+    if (
+      typeof Unauthorized !== 'undefined' &&
+      !isValidElementType(Unauthorized)
+    ) {
+      throw new Error(
+        `The default export of unauthorized is not a React Component in ${segment}`
+      )
+    }
   }
 
   // Handle dynamic segment params.
@@ -425,6 +462,9 @@ async function createComponentTreeInternal({
         const forbiddenComponent =
           Forbidden && isChildrenRouteKey ? <Forbidden /> : undefined
 
+        const unauthorizedComponent =
+          Unauthorized && isChildrenRouteKey ? <Unauthorized /> : undefined
+
         // if we're prefetching and that there's a Loading component, we bail out
         // otherwise we keep rendering for the prefetch.
         // We also want to bail out if there's no Loading component in the tree.
@@ -525,6 +565,8 @@ async function createComponentTreeInternal({
             notFoundStyles={notFoundStyles}
             forbidden={forbiddenComponent}
             forbiddenStyles={forbiddenStyles}
+            unauthorized={unauthorizedComponent}
+            unauthorizedStyles={unauthorizedStyles}
             styles={currentStyles}
           />,
           childCacheNodeSeedData,
diff --git a/packages/next/src/server/app-render/entry-base.ts b/packages/next/src/server/app-render/entry-base.ts
index 2555ee0c8f045..b4f6430fd93ed 100644
--- a/packages/next/src/server/app-render/entry-base.ts
+++ b/packages/next/src/server/app-render/entry-base.ts
@@ -30,6 +30,7 @@ import {
 import { Postpone } from '../../server/app-render/rsc/postpone'
 import { taintObjectReference } from '../../server/app-render/rsc/taint'
 import {
+  UnauthorizedBoundary,
   ForbiddenBoundary,
   NotFoundBoundary,
 } from '../../client/components/ui-errors-boundaries'
@@ -56,6 +57,7 @@ export {
   Postpone,
   taintObjectReference,
   ClientPageRoot,
+  UnauthorizedBoundary,
   NotFoundBoundary,
   ForbiddenBoundary,
   patchFetch,
diff --git a/packages/next/src/server/future/route-modules/helpers/respone-ui-errors.ts b/packages/next/src/server/future/route-modules/helpers/respone-ui-errors.ts
new file mode 100644
index 0000000000000..e69de29bb2d1d
diff --git a/packages/next/src/shared/lib/ui-error-types.ts b/packages/next/src/shared/lib/ui-error-types.ts
index ff26f7b92fa04..921cd08a63408 100644
--- a/packages/next/src/shared/lib/ui-error-types.ts
+++ b/packages/next/src/shared/lib/ui-error-types.ts
@@ -1,5 +1,6 @@
 import { isNotFoundError } from '../../client/components/not-found'
 import { isForbiddenError } from '../../client/components/forbidden'
+import { isUnauthorizedError } from '../../client/components/unauthorized'
 
 const uiErrorsWithStatusCodesMap = {
   'not-found': {
@@ -12,6 +13,11 @@ const uiErrorsWithStatusCodesMap = {
     matcher: isForbiddenError,
     helperName: 'forbidden',
   },
+  unauthorized: {
+    statusCode: 401,
+    matcher: isUnauthorizedError,
+    helperName: 'unauthorized',
+  },
 } as const
 
 const uiErrorFileTypes = Object.keys(