diff --git a/res/css/views/rooms/_PinnedEventTile.pcss b/res/css/views/rooms/_PinnedEventTile.pcss
index b37e3724fcd..33af834ddb3 100644
--- a/res/css/views/rooms/_PinnedEventTile.pcss
+++ b/res/css/views/rooms/_PinnedEventTile.pcss
@@ -24,6 +24,8 @@ limitations under the License.
         flex-direction: column;
         gap: var(--cpd-space-1x);
         width: 100%;
+        /* Prevent a long sender name to overflow the tile */
+        overflow: hidden;
 
         .mx_PinnedEventTile_top {
             display: flex;