diff --git a/src/assets/translations/en.json b/src/assets/translations/en.json
index 2423754..84c2c60 100644
--- a/src/assets/translations/en.json
+++ b/src/assets/translations/en.json
@@ -324,7 +324,9 @@
     "make_public": "Make Public",
     "make_public_warning": "warning: Full message history will be visible to new participants",
     "direct_link": "My Direct Link",
-    "direct_link_desc": "It's ready to share! A new direct room will open each time someone opens the link."
+    "direct_link_desc": "It's ready to share! A new direct room will open each time someone opens the link.",
+    "shared_room_number": "You share {count} rooms with {name}",
+    "shared_room_number_more": "You share more than {count} rooms with {name}"
   },
   "room_info_sheet": {
     "this_room": "This room",
diff --git a/src/components/MemberActionDialog.vue b/src/components/MemberActionDialog.vue
index a2f4f52..fb02f08 100644
--- a/src/components/MemberActionDialog.vue
+++ b/src/components/MemberActionDialog.vue
@@ -18,10 +18,10 @@
           {{
             activeMember.userId == $matrix.currentUserId
               ? $t("room_info.user_you", {
-                  user: activeMember.user ? activeMember.user.displayName : activeMember.name,
+                  user: activeMemberName(activeMember)
                 })
               : $t("room_info.user", {
-                  user: activeMember.user ? activeMember.user.displayName : activeMember.name,
+                  user: activeMemberName(activeMember)
                 })
           }}
           </span>
@@ -32,6 +32,11 @@
             {{ $t("room_info.user_moderator") }}
           </span>
         </div>
+        <template v-if="activeMember.userId != $matrix.currentUserId && sharedRooms.length">
+          <span v-if="sharedRooms.length < 3">{{ $t("room_info.shared_room_number", {count: sharedRooms.length, name: activeMemberName(activeMember)}) }}</span>
+          <span v-else>{{ $t("room_info.shared_room_number_more", {count: sharedRooms.length, name: activeMemberName(activeMember)}) }}</span>
+          <p class="font-weight-light">{{ sharedRooms.slice(0, 3).join(", ") }}</p>
+        </template>
       </div>
       <DeviceList :member="activeMember" />
       <div class="py-3" v-if="activeMember.userId != $matrix.currentUserId">
@@ -83,6 +88,24 @@ export default {
       showDialog: false
     };
   },
+  computed: {
+    joinedMembersByRoomId() {
+      const joinedRooms = this.$matrix.joinedRooms.filter(room => !this.$matrix.isDirectRoom(room)) || [];
+      return joinedRooms.map(room => ({
+        roomId: room.roomId,
+        roomName: room.name,
+        memberIds: room.getJoinedMembers().map(({ userId }) => userId)
+      }));
+    },
+    sharedRooms() {
+      return this.joinedMembersByRoomId.reduce((sharedRooms, room) => {
+        if (room.roomId !== this.room.roomId && room.memberIds.includes(this.activeMember.userId)) {
+          sharedRooms.push(room.roomName);
+        }
+        return sharedRooms;
+      }, []);
+    }
+  },
   watch: {
     show: {
       handler(newVal, ignoredOldVal) {
@@ -97,6 +120,9 @@ export default {
   },
 
   methods: {
+    activeMemberName(activeMember) {
+      return activeMember.user ? activeMember.user.displayName : activeMember.name
+    },
     startPrivateChat(userId) {
       this.$matrix
         .getOrCreatePrivateChat(userId)