diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index b243af7b4c..ab96f79f42 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -347,12 +347,17 @@
               android:windowSoftInputMode="stateHidden"
               android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
 
-        <activity android:name=".MediaPreviewActivity"
+    <activity android:name=".MediaPreviewActivity"
               android:label="@string/AndroidManifest__media_preview"
               android:windowSoftInputMode="stateHidden"
               android:launchMode="singleTask"
               android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
 
+    <activity android:name=".AvatarPreviewActivity"
+              android:label="@string/AndroidManifest__media_preview"
+              android:windowSoftInputMode="stateHidden"
+              android:configChanges="touchscreen|keyboard|keyboardHidden|orientation|screenLayout|screenSize"/>
+
     <activity android:name=".mediaoverview.MediaOverviewActivity"
               android:theme="@style/TextSecure.LightNoActionBar"
               android:windowSoftInputMode="stateHidden"
diff --git a/app/src/main/java/org/thoughtcrime/securesms/AvatarPreviewActivity.java b/app/src/main/java/org/thoughtcrime/securesms/AvatarPreviewActivity.java
new file mode 100644
index 0000000000..d4204d4cb3
--- /dev/null
+++ b/app/src/main/java/org/thoughtcrime/securesms/AvatarPreviewActivity.java
@@ -0,0 +1,152 @@
+package org.thoughtcrime.securesms;
+
+import android.app.Activity;
+import android.content.Context;
+import android.content.Intent;
+import android.graphics.drawable.Drawable;
+import android.os.Bundle;
+import android.view.View;
+import android.view.Window;
+import android.view.WindowManager;
+import android.widget.ImageView;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.appcompat.widget.Toolbar;
+import androidx.core.app.ActivityOptionsCompat;
+
+import com.bumptech.glide.load.DataSource;
+import com.bumptech.glide.load.engine.DiskCacheStrategy;
+import com.bumptech.glide.load.engine.GlideException;
+import com.bumptech.glide.request.RequestListener;
+import com.bumptech.glide.request.target.Target;
+
+import org.thoughtcrime.securesms.contacts.avatars.ContactPhoto;
+import org.thoughtcrime.securesms.contacts.avatars.FallbackContactPhoto;
+import org.thoughtcrime.securesms.contacts.avatars.ProfileContactPhoto;
+import org.thoughtcrime.securesms.contacts.avatars.ResourceContactPhoto;
+import org.thoughtcrime.securesms.logging.Log;
+import org.thoughtcrime.securesms.mms.GlideApp;
+import org.thoughtcrime.securesms.recipients.Recipient;
+import org.thoughtcrime.securesms.recipients.RecipientId;
+
+/**
+ * Activity for displaying avatars full screen.
+ */
+public final class AvatarPreviewActivity extends PassphraseRequiredActionBarActivity {
+
+  private static final String TAG = Log.tag(AvatarPreviewActivity.class);
+
+  private static final String RECIPIENT_ID_EXTRA = "recipient_id";
+
+  public static @NonNull Intent intentFromRecipientId(@NonNull Context context,
+                                                      @NonNull RecipientId recipientId)
+  {
+    Intent intent = new Intent(context, AvatarPreviewActivity.class);
+    intent.putExtra(RECIPIENT_ID_EXTRA, recipientId.serialize());
+    return intent;
+  }
+
+  public static Bundle createTransitionBundle(@NonNull Activity activity, @NonNull View from) {
+    return ActivityOptionsCompat.makeSceneTransitionAnimation(activity, from, "avatar").toBundle();
+  }
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState, boolean ready) {
+    super.onCreate(savedInstanceState, ready);
+
+    setTheme(R.style.TextSecure_MediaPreview);
+    setContentView(R.layout.contact_photo_preview_activity);
+
+    Toolbar toolbar = findViewById(R.id.toolbar);
+    ImageView avatar = findViewById(R.id.avatar);
+
+    setSupportActionBar(toolbar);
+
+    getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
+                         WindowManager.LayoutParams.FLAG_FULLSCREEN);
+
+    showSystemUI();
+
+    getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+
+    Context     context     = getApplicationContext();
+    RecipientId recipientId = RecipientId.from(getIntent().getStringExtra(RECIPIENT_ID_EXTRA));
+
+    Recipient.live(recipientId).observe(this, recipient -> {
+      ContactPhoto contactPhoto  = recipient.isLocalNumber() ? new ProfileContactPhoto(recipient, recipient.getProfileAvatar())
+                                                                   : recipient.getContactPhoto();
+      FallbackContactPhoto fallbackPhoto = recipient.isLocalNumber() ? new ResourceContactPhoto(R.drawable.ic_profile_outline_40, R.drawable.ic_profile_outline_20, R.drawable.ic_person_large)
+                                                                     : recipient.getFallbackContactPhoto();
+
+      GlideApp.with(this).load(contactPhoto)
+                   .fallback(fallbackPhoto.asCallCard(this))
+                   .error(fallbackPhoto.asCallCard(this))
+                   .diskCacheStrategy(DiskCacheStrategy.ALL)
+                   .addListener(new RequestListener<Drawable>() {
+                     @Override
+                     public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
+                       Log.w(TAG, "Unable to load avatar, or avatar removed, closing");
+                       finish();
+                       return false;
+                     }
+
+                     @Override
+                     public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
+                       return false;
+                     }
+                   })
+                   .into(avatar);
+
+      toolbar.setTitle(recipient.toShortString(context));
+    });
+
+    avatar.setOnClickListener(v -> toggleUiVisibility());
+
+    showAndHideWithSystemUI(getWindow(), findViewById(R.id.toolbar_layout));
+  }
+
+  private static void showAndHideWithSystemUI(@NonNull Window window, @NonNull View... views) {
+    window.getDecorView().setOnSystemUiVisibilityChangeListener(visibility -> {
+      boolean hide = (visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) != 0;
+
+      for (View view : views) {
+        view.animate()
+            .alpha(hide ? 0 : 1)
+            .start();
+      }
+    });
+  }
+
+  private void toggleUiVisibility() {
+    int systemUiVisibility = getWindow().getDecorView().getSystemUiVisibility();
+    if ((systemUiVisibility & View.SYSTEM_UI_FLAG_FULLSCREEN) != 0) {
+      showSystemUI();
+    } else {
+      hideSystemUI();
+    }
+  }
+
+  private void hideSystemUI() {
+    getWindow().getDecorView().setSystemUiVisibility(
+        View.SYSTEM_UI_FLAG_IMMERSIVE              |
+        View.SYSTEM_UI_FLAG_LAYOUT_STABLE          |
+        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
+        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN      |
+        View.SYSTEM_UI_FLAG_HIDE_NAVIGATION        |
+        View.SYSTEM_UI_FLAG_FULLSCREEN              );
+  }
+
+  private void showSystemUI() {
+    getWindow().getDecorView().setSystemUiVisibility(
+        View.SYSTEM_UI_FLAG_LAYOUT_STABLE          |
+        View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION |
+        View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN       );
+  }
+
+  @Override
+  public boolean onSupportNavigateUp() {
+    onBackPressed();
+    return true;
+  }
+}
diff --git a/app/src/main/java/org/thoughtcrime/securesms/RecipientPreferenceActivity.java b/app/src/main/java/org/thoughtcrime/securesms/RecipientPreferenceActivity.java
index 62306d4181..76b962bea4 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/RecipientPreferenceActivity.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/RecipientPreferenceActivity.java
@@ -5,6 +5,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
 import android.graphics.Color;
+import android.graphics.drawable.Drawable;
 import android.media.Ringtone;
 import android.media.RingtoneManager;
 import android.net.Uri;
@@ -35,7 +36,11 @@ import androidx.preference.Preference;
 import androidx.preference.PreferenceCategory;
 import androidx.recyclerview.widget.RecyclerView;
 
+import com.bumptech.glide.load.DataSource;
 import com.bumptech.glide.load.engine.DiskCacheStrategy;
+import com.bumptech.glide.load.engine.GlideException;
+import com.bumptech.glide.request.RequestListener;
+import com.bumptech.glide.request.target.Target;
 import com.google.android.material.appbar.CollapsingToolbarLayout;
 
 import org.thoughtcrime.securesms.color.MaterialColor;
@@ -69,7 +74,6 @@ import org.thoughtcrime.securesms.recipients.RecipientId;
 import org.thoughtcrime.securesms.recipients.RecipientUtil;
 import org.thoughtcrime.securesms.util.CommunicationActions;
 import org.thoughtcrime.securesms.util.DynamicDarkToolbarTheme;
-import org.thoughtcrime.securesms.util.DynamicLanguage;
 import org.thoughtcrime.securesms.util.DynamicTheme;
 import org.thoughtcrime.securesms.util.FeatureFlags;
 import org.thoughtcrime.securesms.util.IdentityUtil;
@@ -100,8 +104,7 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
   private static final String PREFERENCE_ABOUT                 = "pref_key_number";
   private static final String PREFERENCE_CUSTOM_NOTIFICATIONS  = "pref_key_recipient_custom_notifications";
 
-  private final DynamicTheme    dynamicTheme    = new DynamicDarkToolbarTheme();
-  private final DynamicLanguage dynamicLanguage = new DynamicLanguage();
+  private final DynamicTheme dynamicTheme = new DynamicDarkToolbarTheme();
 
   private ImageView               avatar;
   private GlideRequests           glideRequests;
@@ -120,7 +123,6 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
   @Override
   public void onPreCreate() {
     dynamicTheme.onCreate(this);
-    dynamicLanguage.onCreate(this);
   }
 
   @Override
@@ -135,14 +137,13 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
     setHeader(recipient.get());
     recipient.observe(this, this::setHeader);
 
-    getSupportLoaderManager().initLoader(0, null, this);
+    LoaderManager.getInstance(this).initLoader(0, null, this);
   }
 
   @Override
   public void onResume() {
     super.onResume();
     dynamicTheme.onResume(this);
-    dynamicLanguage.onResume(this);
   }
 
   @Override
@@ -165,10 +166,10 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
   }
 
   private void initializeToolbar() {
-    this.toolbarLayout        = ViewUtil.findById(this, R.id.collapsing_toolbar);
-    this.avatar               = ViewUtil.findById(this, R.id.avatar);
-    this.threadPhotoRailView  = ViewUtil.findById(this, R.id.recent_photos);
-    this.threadPhotoRailLabel = ViewUtil.findById(this, R.id.rail_label);
+    this.toolbarLayout        = findViewById(R.id.collapsing_toolbar);
+    this.avatar               = findViewById(R.id.avatar);
+    this.threadPhotoRailView  = findViewById(R.id.recent_photos);
+    this.threadPhotoRailLabel = findViewById(R.id.rail_label);
 
     this.toolbarLayout.setExpandedTitleColor(ThemeUtil.getThemedColor(this, R.attr.conversation_title_color));
     this.toolbarLayout.setCollapsedTitleTextColor(ThemeUtil.getThemedColor(this, R.attr.conversation_title_color));
@@ -189,7 +190,7 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
       }
     );
 
-    Toolbar toolbar = ViewUtil.findById(this, R.id.toolbar);
+    Toolbar toolbar = findViewById(R.id.toolbar);
     setSupportActionBar(toolbar);
     getSupportActionBar().setDisplayHomeAsUpEnabled(true);
     getSupportActionBar().setLogo(null);
@@ -215,6 +216,20 @@ public class RecipientPreferenceActivity extends PassphraseRequiredActionBarActi
                  .fallback(fallbackPhoto.asCallCard(this))
                  .error(fallbackPhoto.asCallCard(this))
                  .diskCacheStrategy(DiskCacheStrategy.ALL)
+                 .addListener(new RequestListener<Drawable>() {
+                   @Override
+                   public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
+                     avatar.setOnClickListener(null);
+                     return false;
+                   }
+
+                   @Override
+                   public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
+                     avatar.setOnClickListener(v -> startActivity(AvatarPreviewActivity.intentFromRecipientId(RecipientPreferenceActivity.this, recipient.getId()),
+                                                                  AvatarPreviewActivity.createTransitionBundle(RecipientPreferenceActivity.this, avatar)));
+                     return false;
+                   }
+                 })
                  .into(this.avatar);
 
     if (contactPhoto == null) this.avatar.setScaleType(ImageView.ScaleType.CENTER_INSIDE);
diff --git a/app/src/main/java/org/thoughtcrime/securesms/groups/ui/managegroup/ManageGroupFragment.java b/app/src/main/java/org/thoughtcrime/securesms/groups/ui/managegroup/ManageGroupFragment.java
index 0952a56571..5a69d1c1ce 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/groups/ui/managegroup/ManageGroupFragment.java
+++ b/app/src/main/java/org/thoughtcrime/securesms/groups/ui/managegroup/ManageGroupFragment.java
@@ -22,6 +22,7 @@ import androidx.fragment.app.Fragment;
 import androidx.fragment.app.FragmentActivity;
 import androidx.lifecycle.ViewModelProviders;
 
+import org.thoughtcrime.securesms.AvatarPreviewActivity;
 import org.thoughtcrime.securesms.ContactSelectionListFragment;
 import org.thoughtcrime.securesms.MediaPreviewActivity;
 import org.thoughtcrime.securesms.MuteDialog;
@@ -189,7 +190,14 @@ public class ManageGroupFragment extends Fragment {
     viewModel.getTitle().observe(getViewLifecycleOwner(), toolbar::setTitle);
     viewModel.getMemberCountSummary().observe(getViewLifecycleOwner(), memberCountUnderAvatar::setText);
     viewModel.getFullMemberCountSummary().observe(getViewLifecycleOwner(), memberCountAboveList::setText);
-    viewModel.getGroupRecipient().observe(getViewLifecycleOwner(), avatar::setRecipient);
+    viewModel.getGroupRecipient().observe(getViewLifecycleOwner(), groupRecipient -> {
+      avatar.setRecipient(groupRecipient);
+      avatar.setOnClickListener(v -> {
+        FragmentActivity activity = requireActivity();
+        activity.startActivity(AvatarPreviewActivity.intentFromRecipientId(activity, groupRecipient.getId()),
+                               AvatarPreviewActivity.createTransitionBundle(activity, avatar));
+      });
+    });
 
     viewModel.getGroupViewState().observe(getViewLifecycleOwner(), vs -> {
       if (vs == null) return;
diff --git a/app/src/main/res/layout/contact_photo_preview_activity.xml b/app/src/main/res/layout/contact_photo_preview_activity.xml
new file mode 100644
index 0000000000..7865e35961
--- /dev/null
+++ b/app/src/main/res/layout/contact_photo_preview_activity.xml
@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="utf-8"?>
+<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/core_grey_95">
+
+    <ImageView
+        android:id="@+id/avatar"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:transitionName="avatar" />
+
+    <com.google.android.material.appbar.AppBarLayout
+        android:id="@+id/toolbar_layout"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:background="@color/media_preview_bar_background"
+        app:elevation="0dp">
+
+        <androidx.appcompat.widget.Toolbar
+            android:id="@+id/toolbar"
+            android:layout_width="match_parent"
+            android:layout_height="?attr/actionBarSize"
+            android:background="@android:color/transparent" />
+
+    </com.google.android.material.appbar.AppBarLayout>
+
+</FrameLayout>