diff --git a/app/soapbox/actions/compose.ts b/app/soapbox/actions/compose.ts
index 57e7909a1..fc576a354 100644
--- a/app/soapbox/actions/compose.ts
+++ b/app/soapbox/actions/compose.ts
@@ -121,7 +121,7 @@ const changeCompose = (composeId: string, text: string) => ({
   text: text,
 });
 
-const replyCompose = (status: Status) =>
+const replyCompose = (status: Status, rebloggedBy?: Account) =>
   (dispatch: AppDispatch, getState: () => RootState) => {
     const state = getState();
     const instance = state.instance;
@@ -133,6 +133,7 @@ const replyCompose = (status: Status) =>
       status: status,
       account: state.accounts.get(state.me),
       explicitAddressing,
+      rebloggedBy,
     });
 
     dispatch(openModal('COMPOSE'));
diff --git a/app/soapbox/components/status-action-bar.tsx b/app/soapbox/components/status-action-bar.tsx
index 9153cb256..dffba35b0 100644
--- a/app/soapbox/components/status-action-bar.tsx
+++ b/app/soapbox/components/status-action-bar.tsx
@@ -82,6 +82,7 @@ const messages = defineMessages({
 
 interface IStatusActionBar {
   status: Status,
+  rebloggedBy?: Account,
   withDismiss?: boolean,
   withLabels?: boolean,
   expandable?: boolean,
@@ -94,6 +95,7 @@ const StatusActionBar: React.FC<IStatusActionBar> = ({
   withLabels = false,
   expandable = true,
   space = 'compact',
+  rebloggedBy,
 }) => {
   const intl = useIntl();
   const history = useHistory();
@@ -123,7 +125,7 @@ const StatusActionBar: React.FC<IStatusActionBar> = ({
 
   const handleReplyClick: React.MouseEventHandler = (e) => {
     if (me) {
-      dispatch(replyCompose(status));
+      dispatch(replyCompose(status, rebloggedBy));
     } else {
       onOpenUnauthorizedModal('REPLY');
     }
diff --git a/app/soapbox/components/status.tsx b/app/soapbox/components/status.tsx
index f01ded300..16e06986f 100644
--- a/app/soapbox/components/status.tsx
+++ b/app/soapbox/components/status.tsx
@@ -130,7 +130,7 @@ const Status: React.FC<IStatus> = (props) => {
 
   const handleHotkeyReply = (e?: KeyboardEvent): void => {
     e?.preventDefault();
-    dispatch(replyCompose(actualStatus));
+    dispatch(replyCompose(status, status.reblog && typeof status.reblog === 'object' ? status.account as AccountEntity : undefined));
   };
 
   const handleHotkeyFavourite = (): void => {
@@ -190,7 +190,7 @@ const Status: React.FC<IStatus> = (props) => {
   };
 
   if (!status) return null;
-  let rebloggedByText, reblogElement, reblogElementMobile;
+  let rebloggedBy, rebloggedByText, reblogElement, reblogElementMobile;
 
   if (hidden) {
     return (
@@ -269,6 +269,8 @@ const Status: React.FC<IStatus> = (props) => {
       messages.reblogged_by,
       { name: String(status.getIn(['account', 'acct'])) },
     );
+
+    rebloggedBy = status.account;
   }
 
   let quote;
@@ -400,7 +402,7 @@ const Status: React.FC<IStatus> = (props) => {
 
             {(!hideActionBar && !isUnderReview) && (
               <div className='pt-4'>
-                <StatusActionBar status={actualStatus} withDismiss={withDismiss} />
+                <StatusActionBar status={actualStatus} rebloggedBy={rebloggedBy as AccountEntity | undefined} withDismiss={withDismiss} />
               </div>
             )}
           </div>
diff --git a/app/soapbox/features/compose/components/reply_mentions.tsx b/app/soapbox/features/compose/components/reply_mentions.tsx
index 865f6539d..0cdfeacba 100644
--- a/app/soapbox/features/compose/components/reply_mentions.tsx
+++ b/app/soapbox/features/compose/components/reply_mentions.tsx
@@ -41,7 +41,7 @@ const ReplyMentions: React.FC<IReplyMentions> = ({ composeId }) => {
     }));
   };
 
-  if (!parentTo || (parentTo.size === 0)) {
+  if (!compose.parent_reblogged_by && (!parentTo || (parentTo.size === 0))) {
     return null;
   }
 
diff --git a/app/soapbox/features/ui/components/reply_mentions_modal.tsx b/app/soapbox/features/ui/components/reply_mentions_modal.tsx
index 2c8fc73b1..de76cf744 100644
--- a/app/soapbox/features/ui/components/reply_mentions_modal.tsx
+++ b/app/soapbox/features/ui/components/reply_mentions_modal.tsx
@@ -22,7 +22,7 @@ const ReplyMentionsModal: React.FC<IReplyMentionsModal> = ({ composeId, onClose
   const status = useAppSelector<StatusEntity | null>(state => getStatus(state, { id: compose.in_reply_to! }));
   const account = useAppSelector((state) => state.accounts.get(state.me));
 
-  const mentions = statusToMentionsAccountIdsArray(status!, account!);
+  const mentions = statusToMentionsAccountIdsArray(status!, account!, compose.parent_reblogged_by);
   const author = (status?.account as AccountEntity).id;
 
   const onClickClose = () => {
diff --git a/app/soapbox/reducers/compose.ts b/app/soapbox/reducers/compose.ts
index 3f02f8cac..2085b02c9 100644
--- a/app/soapbox/reducers/compose.ts
+++ b/app/soapbox/reducers/compose.ts
@@ -99,6 +99,7 @@ export const ReducerCompose = ImmutableRecord({
   tagHistory: ImmutableList<string>(),
   text: '',
   to: ImmutableOrderedSet<string>(),
+  parent_reblogged_by: null as string | null,
 });
 
 type State = ImmutableMap<string, Compose>;
@@ -116,20 +117,22 @@ const statusToTextMentions = (status: ImmutableMap<string, any>, account: Accoun
     .join('');
 };
 
-export const statusToMentionsArray = (status: ImmutableMap<string, any>, account: AccountEntity) => {
+export const statusToMentionsArray = (status: ImmutableMap<string, any>, account: AccountEntity, rebloggedBy?: AccountEntity) => {
   const author = status.getIn(['account', 'acct']) as string;
   const mentions = status.get('mentions')?.map((m: ImmutableMap<string, any>) => m.get('acct')) || [];
 
   return ImmutableOrderedSet([author])
+    .concat(rebloggedBy ? [rebloggedBy.acct] : [])
     .concat(mentions)
     .delete(account.get('acct')) as ImmutableOrderedSet<string>;
 };
 
-export const statusToMentionsAccountIdsArray = (status: StatusEntity, account: AccountEntity) => {
+export const statusToMentionsAccountIdsArray = (status: StatusEntity, account: AccountEntity, parentRebloggedBy?: string | null) => {
   const author = (status.account as AccountEntity).id;
   const mentions = status.mentions.map((m) => m.id);
 
   return ImmutableOrderedSet([author])
+    .concat(parentRebloggedBy ? [parentRebloggedBy] : [])
     .concat(mentions)
     .delete(account.id) as ImmutableOrderedSet<string>;
 };
@@ -308,8 +311,13 @@ export default function compose(state = initialState, action: AnyAction) {
       return updateCompose(state, 'compose-modal', compose => compose.withMutations(map => {
         const defaultCompose = state.get('default')!;
 
+        const to = action.explicitAddressing
+          ? statusToMentionsArray(action.status, action.account, action.rebloggedBy)
+          : ImmutableOrderedSet<string>();
+
         map.set('in_reply_to', action.status.get('id'));
-        map.set('to', action.explicitAddressing ? statusToMentionsArray(action.status, action.account) : ImmutableOrderedSet<string>());
+        map.set('to', to);
+        map.set('parent_reblogged_by', (action.rebloggedBy as AccountEntity)?.id || null);
         map.set('text', !action.explicitAddressing ? statusToTextMentions(action.status, action.account) : '');
         map.set('privacy', privacyPreference(action.status.visibility, defaultCompose.privacy));
         map.set('focusDate', new Date());
@@ -323,6 +331,7 @@ export default function compose(state = initialState, action: AnyAction) {
 
         map.set('quote', action.status.get('id'));
         map.set('to', ImmutableOrderedSet());
+        map.set('parent_reblogged_by', null);
         map.set('text', '');
         map.set('privacy', privacyPreference(action.status.visibility, defaultCompose.privacy));
         map.set('focusDate', new Date());
@@ -404,11 +413,13 @@ export default function compose(state = initialState, action: AnyAction) {
         })));
     case COMPOSE_SET_STATUS:
       return updateCompose(state, 'compose-modal', compose => compose.withMutations(map => {
+        const to = action.explicitAddressing ? getExplicitMentions(action.status.account.id, action.status) : ImmutableOrderedSet<string>();
         if (!action.withRedraft) {
           map.set('id', action.status.get('id'));
         }
         map.set('text', action.rawText || unescapeHTML(expandMentions(action.status)));
-        map.set('to', action.explicitAddressing ? getExplicitMentions(action.status.account.id, action.status) : ImmutableOrderedSet<string>());
+        map.set('to', to);
+        map.set('parent_reblogged_by', null);
         map.set('in_reply_to', action.status.get('in_reply_to_id'));
         map.set('privacy', action.status.get('visibility'));
         map.set('focusDate', new Date());