diff --git a/packages/livechat/src/components/App/App.tsx b/packages/livechat/src/components/App/App.tsx
index 0ca3f1b6b366a..cfaa52b94999d 100644
--- a/packages/livechat/src/components/App/App.tsx
+++ b/packages/livechat/src/components/App/App.tsx
@@ -75,7 +75,26 @@ type AppState = {
 	poppedOut: boolean;
 };
 
-// eslint-disable-next-line react/prefer-stateless-function
+export type ScreenPropsType = {
+	notificationsEnabled: boolean;
+	minimized: boolean;
+	expanded: boolean;
+	windowed: boolean;
+	sound: unknown;
+	alerts: unknown;
+	modal: unknown;
+	nameDefault: string;
+	emailDefault: string;
+	departmentDefault: string;
+	onEnableNotifications: () => unknown;
+	onDisableNotifications: () => unknown;
+	onMinimize: () => unknown;
+	onRestore: () => unknown;
+	onOpenWindow: () => unknown;
+	onDismissAlert: () => unknown;
+	dismissNotification: () => void;
+};
+
 export class App extends Component<AppProps, AppState> {
 	state = {
 		initialized: false,
diff --git a/packages/livechat/src/components/Header/index.js b/packages/livechat/src/components/Header/index.tsx
similarity index 67%
rename from packages/livechat/src/components/Header/index.js
rename to packages/livechat/src/components/Header/index.tsx
index 669b46571b0ef..9764c3c2ce372 100644
--- a/packages/livechat/src/components/Header/index.js
+++ b/packages/livechat/src/components/Header/index.tsx
@@ -1,12 +1,41 @@
+import type { ComponentChildren, Ref } from 'preact';
 import { toChildArray } from 'preact';
+import type { JSXInternal } from 'preact/src/jsx';
 
 import { createClassName } from '../../helpers/createClassName';
 import styles from './styles.scss';
 
-export const Header = ({ children, theme: { color: backgroundColor, fontColor: color } = {}, className, post, large, style, ...props }) => (
+type HeaderProps = {
+	children?: ComponentChildren;
+	theme?: {
+		color?: string;
+		fontColor?: string;
+	};
+	className?: string;
+	post?: ComponentChildren;
+	large?: boolean;
+	style?: JSXInternal.CSSProperties;
+	ref?: Ref<HTMLElement>;
+	onClick?: JSXInternal.DOMAttributes<HTMLElement>['onClick'];
+};
+
+type HeaderComponentProps = {
+	children?: ComponentChildren;
+	className?: string;
+};
+
+export const Header = ({
+	children,
+	theme: { color: backgroundColor, fontColor: color } = {},
+	className,
+	post,
+	large,
+	style,
+	...props
+}: HeaderProps) => (
 	<header
 		className={createClassName(styles, 'header', { large }, [className])}
-		style={style || backgroundColor || color ? { ...(style || {}), backgroundColor, color } : null}
+		style={style || backgroundColor || color ? { ...(style || {}), backgroundColor, color } : undefined}
 		{...props}
 	>
 		{children}
@@ -14,25 +43,25 @@ export const Header = ({ children, theme: { color: backgroundColor, fontColor: c
 	</header>
 );
 
-export const Picture = ({ children, className = undefined, ...props }) => (
+export const Picture = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div className={createClassName(styles, 'header__picture', {}, [className])} {...props}>
 		{children}
 	</div>
 );
 
-export const Content = ({ children, className = undefined, ...props }) => (
+export const Content = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div className={createClassName(styles, 'header__content', {}, [className])} {...props}>
 		{children}
 	</div>
 );
 
-export const Title = ({ children, className = undefined, ...props }) => (
+export const Title = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div className={createClassName(styles, 'header__title', {}, [className])} {...props}>
 		{children}
 	</div>
 );
 
-export const SubTitle = ({ children, className = undefined, ...props }) => (
+export const SubTitle = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div
 		className={createClassName(
 			styles,
@@ -48,25 +77,25 @@ export const SubTitle = ({ children, className = undefined, ...props }) => (
 	</div>
 );
 
-export const Actions = ({ children, className = undefined, ...props }) => (
+export const Actions = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<nav className={createClassName(styles, 'header__actions', {}, [className])} {...props}>
 		{children}
 	</nav>
 );
 
-export const Action = ({ children, className = undefined, ...props }) => (
+export const Action = ({ children, className = undefined, ...props }: HeaderComponentProps & { onClick?: () => void }) => (
 	<button className={createClassName(styles, 'header__action', {}, [className])} {...props}>
 		{children}
 	</button>
 );
 
-export const Post = ({ children, className = undefined, ...props }) => (
+export const Post = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div className={createClassName(styles, 'header__post', {}, [className])} {...props}>
 		{children}
 	</div>
 );
 
-export const CustomField = ({ children, className = undefined, ...props }) => (
+export const CustomField = ({ children, className = undefined, ...props }: HeaderComponentProps) => (
 	<div className={createClassName(styles, 'header__custom-field', {}, [className])} {...props}>
 		{children}
 	</div>
diff --git a/packages/livechat/src/components/Screen/Header.js b/packages/livechat/src/components/Screen/Header.tsx
similarity index 54%
rename from packages/livechat/src/components/Screen/Header.js
rename to packages/livechat/src/components/Screen/Header.tsx
index 9f9e41810c7b6..671a5b343b216 100644
--- a/packages/livechat/src/components/Screen/Header.js
+++ b/packages/livechat/src/components/Screen/Header.tsx
@@ -1,6 +1,8 @@
-import { Component } from 'preact';
-import { withTranslation } from 'react-i18next';
+import type { ComponentChildren } from 'preact';
+import { useRef } from 'preact/hooks';
+import { useTranslation, withTranslation } from 'react-i18next';
 
+import type { Agent } from '../../definitions/agents';
 import MinimizeIcon from '../../icons/arrowDown.svg';
 import RestoreIcon from '../../icons/arrowUp.svg';
 import NotificationsEnabledIcon from '../../icons/bell.svg';
@@ -11,70 +13,84 @@ import { Avatar } from '../Avatar';
 import Header from '../Header';
 import Tooltip from '../Tooltip';
 
-class ScreenHeader extends Component {
-	largeHeader = () => {
-		const { agent } = this.props;
-		return !!(agent && agent.email && agent.phone);
+type screenHeaderProps = {
+	alerts: { id: string; children: ComponentChildren; [key: string]: unknown }[];
+	agent: Agent;
+	notificationsEnabled: boolean;
+	minimized: boolean;
+	expanded: boolean;
+	windowed: boolean;
+	onDismissAlert?: (id?: string) => void;
+	onEnableNotifications: () => unknown;
+	onDisableNotifications: () => unknown;
+	onMinimize: () => unknown;
+	onRestore: () => unknown;
+	onOpenWindow: () => unknown;
+	queueInfo: {
+		spot: number;
 	};
+	title: string;
+};
 
-	headerTitle = (t) => {
-		const { agent, queueInfo, title } = this.props;
-		if (agent && agent.name) {
+const ScreenHeader = ({
+	alerts,
+	agent,
+	notificationsEnabled,
+	minimized,
+	expanded,
+	windowed,
+	onDismissAlert,
+	onEnableNotifications,
+	onDisableNotifications,
+	onMinimize,
+	onRestore,
+	onOpenWindow,
+	queueInfo,
+	title,
+}: screenHeaderProps) => {
+	const { t } = useTranslation();
+	const headerRef = useRef<HTMLElement>(null);
+
+	const largeHeader = () => {
+		return !!(agent?.email && agent.phone);
+	};
+
+	const headerTitle = () => {
+		if (agent?.name) {
 			return agent.name;
 		}
 
-		if (queueInfo && queueInfo.spot && queueInfo.spot > 0) {
+		if (queueInfo?.spot && queueInfo.spot > 0) {
 			return t('waiting_queue');
 		}
 
 		return title;
 	};
 
-	render = ({
-		alerts,
-		agent,
-		notificationsEnabled,
-		minimized,
-		expanded,
-		windowed,
-		onDismissAlert,
-		onEnableNotifications,
-		onDisableNotifications,
-		onMinimize,
-		onRestore,
-		onOpenWindow,
-		t,
-	}) => (
+	return (
 		<Header
-			ref={this.handleRef}
+			ref={headerRef}
 			post={
 				<Header.Post>
-					{alerts &&
-						alerts.map((alert) => (
-							<Alert {...alert} onDismiss={onDismissAlert}>
-								{alert.children}
-							</Alert>
-						))}
+					{alerts?.map((alert) => (
+						<Alert {...alert} onDismiss={onDismissAlert}>
+							{alert.children}
+						</Alert>
+					))}
 				</Header.Post>
 			}
-			large={this.largeHeader()}
+			large={largeHeader()}
 		>
-			{agent && agent.avatar && (
+			{agent?.avatar && (
 				<Header.Picture>
-					<Avatar
-						src={agent.avatar.src}
-						description={agent.avatar.description}
-						status={agent.status}
-						large={this.largeHeader()}
-						statusBorder
-					/>
+					<Avatar src={agent.avatar.src} description={agent.avatar.description} status={agent.status} large={largeHeader()} />
 				</Header.Picture>
 			)}
 
 			<Header.Content>
-				<Header.Title>{this.headerTitle(t)}</Header.Title>
-				{agent && agent.email && <Header.SubTitle>{agent.email}</Header.SubTitle>}
-				{agent && agent.phone && <Header.CustomField>{agent.phone}</Header.CustomField>}
+				<Header.Title>{headerTitle()}</Header.Title>
+				{agent?.email && <Header.SubTitle>{agent.email}</Header.SubTitle>}
+				{agent?.phone && <Header.CustomField>{agent.phone}</Header.CustomField>}
 			</Header.Content>
 			<Tooltip.Container>
 				<Header.Actions>
@@ -108,6 +124,6 @@ class ScreenHeader extends Component {
 			</Tooltip.Container>
 		</Header>
 	);
-}
+};
 
 export default withTranslation()(ScreenHeader);
diff --git a/packages/livechat/src/components/Tooltip/index.js b/packages/livechat/src/components/Tooltip/index.js
index 2f5368d8729cb..3b2d36f3609a5 100644
--- a/packages/livechat/src/components/Tooltip/index.js
+++ b/packages/livechat/src/components/Tooltip/index.js
@@ -98,7 +98,7 @@ export class TooltipContainer extends Component {
 	}
 }
 
-export const TooltipTrigger = ({ children, content, placement }) => (
+export const TooltipTrigger = ({ children, content, placement = '' }) => (
 	<TooltipContext.Consumer>
 		{({ showTooltip, hideTooltip }) =>
 			toChildArray(children).map((child, index) =>
diff --git a/packages/livechat/src/definitions/agents.d.ts b/packages/livechat/src/definitions/agents.d.ts
new file mode 100644
index 0000000000000..da1b812425742
--- /dev/null
+++ b/packages/livechat/src/definitions/agents.d.ts
@@ -0,0 +1,13 @@
+// TODO: Fully type agents in livechat
+export type Agent = {
+	name?: string;
+	status?: string;
+	email?: string;
+	phone?: string;
+	username: string;
+	avatar?: {
+		description: string;
+		src: string;
+	};
+	[key: string]: unknown;
+};