diff --git a/src/button/Button.tsx b/src/button/Button.tsx
index 2c2605f..c29b5f2 100644
--- a/src/button/Button.tsx
+++ b/src/button/Button.tsx
@@ -13,7 +13,7 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
 */
-import React, { forwardRef } from "react";
+import React, { forwardRef, useCallback } from "react";
 import { PressEvent } from "@react-types/shared";
 import classNames from "classnames";
 import { useButton } from "@react-aria/button";
@@ -29,6 +29,8 @@ import { ReactComponent as ScreenshareIcon } from "../icons/Screenshare.svg";
 import { ReactComponent as SettingsIcon } from "../icons/Settings.svg";
 import { ReactComponent as AddUserIcon } from "../icons/AddUser.svg";
 import { ReactComponent as ArrowDownIcon } from "../icons/ArrowDown.svg";
+import { ReactComponent as Fullscreen } from "../icons/Fullscreen.svg";
+import { ReactComponent as FullscreenExit } from "../icons/FullscreenExit.svg";
 import { TooltipTrigger } from "../Tooltip";
 import { VolumeIcon } from "./VolumeIcon";
 
@@ -262,3 +264,24 @@ export function AudioButton({ volume, ...rest }: AudioButtonProps) {
     </TooltipTrigger>
   );
 }
+
+interface FullscreenButtonProps extends Omit<Props, "variant"> {
+  fullscreen?: boolean;
+}
+
+export function FullscreenButton({
+  fullscreen,
+  ...rest
+}: FullscreenButtonProps) {
+  const getTooltip = useCallback(() => {
+    return fullscreen ? "Exit full screen" : "Full screen";
+  }, [fullscreen]);
+
+  return (
+    <TooltipTrigger tooltip={getTooltip}>
+      <Button variant="icon" {...rest}>
+        {fullscreen ? <FullscreenExit /> : <Fullscreen />}
+      </Button>
+    </TooltipTrigger>
+  );
+}
diff --git a/src/icons/Fullscreen.svg b/src/icons/Fullscreen.svg
new file mode 100644
index 0000000..ad8d2b7
--- /dev/null
+++ b/src/icons/Fullscreen.svg
@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M21 8.59V4C21 3.45 20.55 3 20 3H15.41C14.52 3 14.07 4.08 14.7 4.71L16.29 6.3L6.29 16.3L4.7 14.71C4.08 14.08 3 14.52 3 15.41V20C3 20.55 3.45 21 4 21H8.59C9.48 21 9.93 19.92 9.3 19.29L7.71 17.7L17.71 7.7L19.3 9.29C19.92 9.92 21 9.48 21 8.59Z" fill="white"/>
+</svg>
diff --git a/src/icons/FullscreenExit.svg b/src/icons/FullscreenExit.svg
new file mode 100644
index 0000000..f7b8044
--- /dev/null
+++ b/src/icons/FullscreenExit.svg
@@ -0,0 +1,3 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M21.29 4.12L16.7 8.71L18.29 10.3C18.92 10.93 18.47 12.01 17.58 12.01H13C12.45 12.01 12 11.56 12 11.01V6.41C12 5.52 13.08 5.07 13.71 5.7L15.3 7.29L19.89 2.7C20.28 2.31 20.91 2.31 21.3 2.7C21.68 3.1 21.68 3.73 21.29 4.12ZM4.11997 21.29L8.70997 16.7L10.3 18.29C10.93 18.92 12.01 18.47 12.01 17.58V13C12.01 12.45 11.56 12 11.01 12H6.40997C5.51997 12 5.06997 13.08 5.69997 13.71L7.28997 15.3L2.69997 19.89C2.30997 20.28 2.30997 20.91 2.69997 21.3C3.09997 21.68 3.72997 21.68 4.11997 21.29Z" fill="white"/>
+</svg>
diff --git a/src/room/InCallView.module.css b/src/room/InCallView.module.css
index 054e27d..f8783bf 100644
--- a/src/room/InCallView.module.css
+++ b/src/room/InCallView.module.css
@@ -54,6 +54,12 @@ limitations under the License.
   margin-right: 0px;
 }
 
+.footerFullscreen {
+  position: absolute;
+  width: 100%;
+  bottom: 0;
+}
+
 .avatar {
   position: absolute;
   top: 50%;
diff --git a/src/room/InCallView.tsx b/src/room/InCallView.tsx
index 79f1b64..680f9f2 100644
--- a/src/room/InCallView.tsx
+++ b/src/room/InCallView.tsx
@@ -14,10 +14,11 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-import React, { useCallback, useMemo } from "react";
+import React, { useCallback, useMemo, useRef } from "react";
 import { usePreventScroll } from "@react-aria/overlays";
 import { GroupCall, MatrixClient } from "matrix-js-sdk";
 import { CallFeed } from "matrix-js-sdk/src/webrtc/callFeed";
+import classNames from "classnames";
 
 import styles from "./InCallView.module.css";
 import {
@@ -46,6 +47,7 @@ import { useMediaHandler } from "../settings/useMediaHandler";
 import { useShowInspector } from "../settings/useSetting";
 import { useModalTriggerState } from "../Modal";
 import { useAudioContext } from "../video-grid/useMediaStream";
+import { useFullscreen } from "../video-grid/useFullscreen";
 
 const canScreenshare = "getDisplayMedia" in (navigator.mediaDevices ?? {});
 // There is currently a bug in Safari our our code with cloning and sending MediaStreams
@@ -72,7 +74,8 @@ interface Props {
   roomId: string;
   unencryptedEventsFromUsers: Set<string>;
 }
-interface Participant {
+
+export interface Participant {
   id: string;
   callFeed: CallFeed;
   focused: boolean;
@@ -100,7 +103,9 @@ export function InCallView({
   unencryptedEventsFromUsers,
 }: Props) {
   usePreventScroll();
+  const elementRef = useRef<HTMLDivElement>();
   const [layout, setLayout] = useVideoGridLayout(screenshareFeeds.length > 0);
+  const { toggleFullscreen, fullscreenParticipant } = useFullscreen(elementRef);
 
   const [audioContext, audioDestination, audioRef] = useAudioContext();
   const { audioOutput } = useMediaHandler();
@@ -161,65 +166,107 @@ export function InCallView({
     );
   }, []);
 
+  const renderContent = useCallback((): JSX.Element => {
+    if (items.length === 0) {
+      return (
+        <div className={styles.centerMessage}>
+          <p>Waiting for other participants...</p>
+        </div>
+      );
+    }
+    if (fullscreenParticipant) {
+      return (
+        <VideoTileContainer
+          key={fullscreenParticipant.id}
+          item={fullscreenParticipant}
+          getAvatar={renderAvatar}
+          audioOutputDevice={audioOutput}
+          audioContext={audioContext}
+          audioDestination={audioDestination}
+          disableSpeakingIndicator={true}
+          isFullscreen={fullscreenParticipant}
+          onFullscreen={toggleFullscreen}
+        />
+      );
+    }
+
+    return (
+      <VideoGrid items={items} layout={layout} disableAnimations={isSafari}>
+        {({ item, ...rest }: { item: Participant; [x: string]: unknown }) => (
+          <VideoTileContainer
+            key={item.id}
+            item={item}
+            getAvatar={renderAvatar}
+            showName={items.length > 2 || item.focused}
+            audioOutputDevice={audioOutput}
+            audioContext={audioContext}
+            audioDestination={audioDestination}
+            disableSpeakingIndicator={items.length < 3}
+            isFullscreen={fullscreenParticipant}
+            onFullscreen={toggleFullscreen}
+            {...rest}
+          />
+        )}
+      </VideoGrid>
+    );
+  }, [
+    fullscreenParticipant,
+    items,
+    audioContext,
+    audioDestination,
+    audioOutput,
+    layout,
+    renderAvatar,
+    toggleFullscreen,
+  ]);
+
   const {
     modalState: rageshakeRequestModalState,
     modalProps: rageshakeRequestModalProps,
   } = useRageshakeRequestModal(groupCall.room.roomId);
 
+  const footerClassNames = classNames(styles.footer, {
+    [styles.footerFullscreen]: fullscreenParticipant,
+  });
+
   return (
-    <div className={styles.inRoom}>
+    <div className={styles.inRoom} ref={elementRef}>
       <audio ref={audioRef} />
-      <Header>
-        <LeftNav>
-          <RoomHeaderInfo roomName={roomName} avatarUrl={avatarUrl} />
-          <VersionMismatchWarning
-            users={unencryptedEventsFromUsers}
-            room={groupCall.room}
-          />
-        </LeftNav>
-        <RightNav>
-          <GridLayoutMenu layout={layout} setLayout={setLayout} />
-          <UserMenuContainer preventNavigation />
-        </RightNav>
-      </Header>
-      {items.length === 0 ? (
-        <div className={styles.centerMessage}>
-          <p>Waiting for other participants...</p>
-        </div>
-      ) : (
-        <VideoGrid items={items} layout={layout} disableAnimations={isSafari}>
-          {({ item, ...rest }: { item: Participant; [x: string]: unknown }) => (
-            <VideoTileContainer
-              key={item.id}
-              item={item}
-              getAvatar={renderAvatar}
-              showName={items.length > 2 || item.focused}
-              audioOutputDevice={audioOutput}
-              audioContext={audioContext}
-              audioDestination={audioDestination}
-              disableSpeakingIndicator={items.length < 3}
-              {...rest}
+      {!fullscreenParticipant && (
+        <Header>
+          <LeftNav>
+            <RoomHeaderInfo roomName={roomName} avatarUrl={avatarUrl} />
+            <VersionMismatchWarning
+              users={unencryptedEventsFromUsers}
+              room={groupCall.room}
             />
-          )}
-        </VideoGrid>
+          </LeftNav>
+          <RightNav>
+            <GridLayoutMenu layout={layout} setLayout={setLayout} />
+            <UserMenuContainer preventNavigation />
+          </RightNav>
+        </Header>
       )}
-      <div className={styles.footer}>
+      {renderContent()}
+      <div className={footerClassNames}>
         <MicButton muted={microphoneMuted} onPress={toggleMicrophoneMuted} />
         <VideoButton muted={localVideoMuted} onPress={toggleLocalVideoMuted} />
-        {canScreenshare && !isSafari && (
+        {canScreenshare && !isSafari && !fullscreenParticipant && (
           <ScreenshareButton
             enabled={isScreensharing}
             onPress={toggleScreensharing}
           />
         )}
-        <OverflowMenu
-          inCall
-          roomId={roomId}
-          groupCall={groupCall}
-          showInvite={true}
-          feedbackModalState={feedbackModalState}
-          feedbackModalProps={feedbackModalProps}
-        />
+        {!fullscreenParticipant && (
+          <OverflowMenu
+            inCall
+            roomId={roomId}
+            groupCall={groupCall}
+            showInvite={true}
+            feedbackModalState={feedbackModalState}
+            feedbackModalProps={feedbackModalProps}
+          />
+        )}
         <HangupButton onPress={onLeave} />
       </div>
       <GroupCallInspector
diff --git a/src/video-grid/VideoTile.jsx b/src/video-grid/VideoTile.jsx
index c1f842a..0d58a7b 100644
--- a/src/video-grid/VideoTile.jsx
+++ b/src/video-grid/VideoTile.jsx
@@ -20,7 +20,7 @@ import classNames from "classnames";
 import styles from "./VideoTile.module.css";
 import { ReactComponent as MicMutedIcon } from "../icons/MicMuted.svg";
 import { ReactComponent as VideoMutedIcon } from "../icons/VideoMuted.svg";
-import { AudioButton } from "../button/Button";
+import { AudioButton, FullscreenButton } from "../button/Button";
 
 export const VideoTile = forwardRef(
   (
@@ -39,6 +39,8 @@ export const VideoTile = forwardRef(
       onOptionsPress,
       showOptions,
       localVolume,
+      isFullscreen,
+      onFullscreen,
       ...rest
     },
     ref
@@ -50,17 +52,27 @@ export const VideoTile = forwardRef(
           [styles.speaking]: speaking,
           [styles.muted]: audioMuted,
           [styles.screenshare]: screenshare,
+          [styles.fullscreen]: isFullscreen,
         })}
         ref={ref}
         {...rest}
       >
-        {showOptions && (
+        {(!isLocal || screenshare) && (
           <div className={classNames(styles.toolbar)}>
-            <AudioButton
-              className={styles.button}
-              volume={localVolume}
-              onPress={onOptionsPress}
-            />
+            {!isLocal && (
+              <AudioButton
+                className={styles.button}
+                volume={localVolume}
+                onPress={onOptionsPress}
+              />
+            )}
+            {screenshare && (
+              <FullscreenButton
+                className={styles.button}
+                fullscreen={isFullscreen}
+                onPress={onFullscreen}
+              />
+            )}
           </div>
         )}
         {(videoMuted || noVideo) && (
diff --git a/src/video-grid/VideoTile.module.css b/src/video-grid/VideoTile.module.css
index 11cf74c..4a594bd 100644
--- a/src/video-grid/VideoTile.module.css
+++ b/src/video-grid/VideoTile.module.css
@@ -40,6 +40,11 @@
   box-shadow: inset 0 0 0 4px var(--accent) !important;
 }
 
+.videoTile.fullscreen {
+  position: relative;
+  border-radius: 0;
+}
+
 .videoTile.screenshare > video {
   object-fit: contain;
 }
@@ -79,11 +84,11 @@
   z-index: 1;
 }
 
-.videoTile:not(.isLocal):not(:hover) .toolbar {
-  display: none;
+.toolbar:not(:hover) {
+  opacity: 0;
 }
 
-.videoTile:not(.isLocal):hover .presenterLabel {
+.toolbar:hover + .presenterLabel {
   top: calc(42px + 20px); /* toolbar + margin */
 }
 
diff --git a/src/video-grid/VideoTileContainer.jsx b/src/video-grid/VideoTileContainer.jsx
index c18fa4c..55de199 100644
--- a/src/video-grid/VideoTileContainer.jsx
+++ b/src/video-grid/VideoTileContainer.jsx
@@ -22,6 +22,7 @@ import { useRoomMemberName } from "./useRoomMemberName";
 import { VideoTile } from "./VideoTile";
 import { VideoTileSettingsModal } from "./VideoTileSettingsModal";
 import { useModalTriggerState } from "../Modal";
+import { useCallback } from "react";
 
 export function VideoTileContainer({
   item,
@@ -33,6 +34,8 @@ export function VideoTileContainer({
   audioContext,
   audioDestination,
   disableSpeakingIndicator,
+  isFullscreen,
+  onFullscreen,
   ...rest
 }) {
   const {
@@ -63,6 +66,10 @@ export function VideoTileContainer({
     videoTileSettingsModalState.open();
   };
 
+  const onFullscreenCallback = useCallback(() => {
+    onFullscreen(item);
+  }, [onFullscreen, item]);
+
   // Firefox doesn't respect the disablePictureInPicture attribute
   // https://bugzilla.mozilla.org/show_bug.cgi?id=1611831
 
@@ -81,8 +88,9 @@ export function VideoTileContainer({
         mediaRef={mediaRef}
         avatar={getAvatar && getAvatar(member, width, height)}
         onOptionsPress={onOptionsPress}
-        showOptions={!item.callFeed.isLocal()}
         localVolume={localVolume}
+        isFullscreen={isFullscreen}
+        onFullscreen={onFullscreenCallback}
         {...rest}
       />
       {videoTileSettingsModalState.isOpen && (
diff --git a/src/video-grid/useFullscreen.tsx b/src/video-grid/useFullscreen.tsx
new file mode 100644
index 0000000..2d354a4
--- /dev/null
+++ b/src/video-grid/useFullscreen.tsx
@@ -0,0 +1,56 @@
+/*
+Copyright 2022 New Vector Ltd
+
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import { useCallback, useState } from "react";
+
+import { Participant } from "../room/InCallView";
+import { useEventTarget } from "../useEvents";
+
+export function useFullscreen(ref: React.RefObject<HTMLElement>): {
+  toggleFullscreen: (participant: Participant) => void;
+  fullscreenParticipant: Participant | null;
+} {
+  const [fullscreenParticipant, setFullscreenParticipant] =
+    useState<Participant | null>(null);
+
+  const toggleFullscreen = useCallback(
+    (participant: Participant) => {
+      if (fullscreenParticipant) {
+        document.exitFullscreen();
+        setFullscreenParticipant(null);
+      } else {
+        try {
+          ref.current.requestFullscreen();
+          setFullscreenParticipant(participant);
+        } catch (error) {
+          console.warn("Failed to fullscreen:", error);
+        }
+      }
+    },
+    [fullscreenParticipant, setFullscreenParticipant, ref]
+  );
+
+  const onFullscreenChanged = useCallback(() => {
+    if (!document.fullscreenElement) {
+      setFullscreenParticipant(null);
+    }
+  }, [setFullscreenParticipant]);
+
+  useEventTarget(ref.current, "fullscreenchange", onFullscreenChanged);
+
+  return { toggleFullscreen, fullscreenParticipant };
+}