diff --git a/components/lib/cascadeselect/CascadeSelect.d.ts b/components/lib/cascadeselect/CascadeSelect.d.ts
index c6e4b6638..fd555861f 100644
--- a/components/lib/cascadeselect/CascadeSelect.d.ts
+++ b/components/lib/cascadeselect/CascadeSelect.d.ts
@@ -109,6 +109,10 @@ export interface CascadeSelectPassThroughOptions {
      * @see {@link BaseComponent.ComponentHooks}
      */
     hooks?: ComponentHooks;
+    /**
+     * Used to control Vue Transition API.
+     */
+    transition?: any;
 }
 
 /**
diff --git a/components/lib/cascadeselect/CascadeSelect.vue b/components/lib/cascadeselect/CascadeSelect.vue
index 778c9c9fd..a5c94ba1d 100644
--- a/components/lib/cascadeselect/CascadeSelect.vue
+++ b/components/lib/cascadeselect/CascadeSelect.vue
@@ -42,7 +42,7 @@
             {{ searchResultMessageText }}
         </span>
         <Portal :appendTo="appendTo">
-            <transition name="p-connected-overlay" @enter="onOverlayEnter" @after-enter="onOverlayAfterEnter" @leave="onOverlayLeave" @after-leave="onOverlayAfterLeave">
+            <transition name="p-connected-overlay" @enter="onOverlayEnter" @after-enter="onOverlayAfterEnter" @leave="onOverlayLeave" @after-leave="onOverlayAfterLeave" v-bind="ptm('transition')">
                 <div v-if="overlayVisible" :ref="overlayRef" :class="[cx('panel'), panelClass]" :style="panelStyle" @click="onOverlayClick" @keydown="onOverlayKeyDown" v-bind="{ ...panelProps, ...ptm('panel') }">
                     <div :class="cx('wrapper')" v-bind="ptm('wrapper')">
                         <CascadeSelectSub