diff --git a/api-generator/components/cascadeselect.js b/api-generator/components/cascadeselect.js
index 743e85d69..8715876d5 100644
--- a/api-generator/components/cascadeselect.js
+++ b/api-generator/components/cascadeselect.js
@@ -184,6 +184,12 @@ const CascadeSelectProps = [
         type: 'string',
         default: 'null',
         description: 'Identifier of the underlying input element.'
+    },
+    {
+        name: 'pt',
+        type: 'any',
+        default: 'null',
+        description: 'Uses to pass attributes to DOM elements inside the component.'
     }
 ];
 
diff --git a/components/lib/cascadeselect/CascadeSelect.d.ts b/components/lib/cascadeselect/CascadeSelect.d.ts
index e55163b0a..210d2e727 100644
--- a/components/lib/cascadeselect/CascadeSelect.d.ts
+++ b/components/lib/cascadeselect/CascadeSelect.d.ts
@@ -10,6 +10,16 @@
 import { HTMLAttributes, InputHTMLAttributes, VNode } from 'vue';
 import { ClassComponent, GlobalComponentConstructor } from '../ts-helpers';
 
+export declare type CascadeSelectPassThroughOptionType = CascadeSelectPassThroughAttributes | ((options: CascadeSelectPassThroughMethodOptions) => CascadeSelectPassThroughAttributes) | null | undefined;
+
+/**
+ * Custom passthrough(pt) option method.
+ */
+export interface CascadeSelectPassThroughMethodOptions {
+    props: CascadeSelectProps;
+    state: CascadeSelectState;
+}
+
 /**
  * Custom change event
  * @see {@link CascadeSelectEmits.change}
@@ -31,6 +41,124 @@ export interface CascadeSelectChangeEvent {
  */
 export interface CascadeSelectGroupChangeEvent extends CascadeSelectChangeEvent {}
 
+/**
+ * Custom passthrough(pt) options.
+ * @see {@link CascadeSelectProps.pt}
+ */
+export interface CascadeSelectPassThroughOptions {
+    /**
+     * Uses to pass attributes to the root's DOM element.
+     */
+    root?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the input's DOM element.
+     */
+    input?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the label's DOM element.
+     */
+    label?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the dropdown button's DOM element.
+     */
+    dropdownButton?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the loading icon's DOM element.
+     */
+    loadingIcon?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the dropdown icon's DOM element.
+     */
+    dropdownIcon?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the panel's DOM element.
+     */
+    panel?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the list's DOM element.
+     */
+    list?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the item's DOM element.
+     */
+    item?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the content's DOM element.
+     */
+    content?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the text's DOM element.
+     */
+    text?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the input sria's DOM element.
+     */
+    inputAria?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the search result message text aria's DOM element.
+     */
+    searchResultAria?: CascadeSelectPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the selected message text aria's DOM element.
+     */
+    selectedMessageAria?: CascadeSelectPassThroughOptionType;
+}
+
+/**
+ * Custom passthrough attributes for each DOM elements
+ */
+export interface CascadeSelectPassThroughAttributes {
+    [key: string]: any;
+}
+
+/**
+ * Defines focused item info
+ */
+export interface CascadeSelectFocusedOptionInfo {
+    /**
+     * Active item index
+     */
+    index: number;
+    /**
+     * Active item level
+     */
+    level: number;
+    /**
+     * Parent key info
+     */
+    parentKey: string;
+}
+
+/**
+ * Defines current inline state in CascadeSelect component.
+ */
+export interface CascadeSelectState {
+    /**
+     * Current id state as a string
+     */
+    id: string;
+    /**
+     * Current focused state as a boolean.
+     * @defaultValue false
+     */
+    focused: boolean;
+    /**
+     * Current focused item info.
+     * @type {CascadeSelectFocusedOptionInfo}
+     */
+    focusedOptionInfo: CascadeSelectFocusedOptionInfo;
+    /**
+     * Current focused state as a boolean.
+     * @defaultValue false
+     */
+    activeOptionPath: any[];
+    /**
+     * Current overlay visible state as a boolean.
+     * @defaultValue false
+     */
+    overlayVisible: boolean;
+}
+
 /**
  * Defines valid properties in CascadeSelect component.
  */
@@ -180,6 +308,11 @@ export interface CascadeSelectProps {
      * Establishes a string value that labels the component.
      */
     'aria-label'?: string | undefined;
+    /**
+     * Uses to pass attributes to DOM elements inside the component.
+     * @type {CascadeSelectPassThroughOptions}
+     */
+    pt?: CascadeSelectPassThroughOptions;
 }
 
 /**
diff --git a/components/lib/cascadeselect/CascadeSelect.vue b/components/lib/cascadeselect/CascadeSelect.vue
index a214584fe..47579be4c 100644
--- a/components/lib/cascadeselect/CascadeSelect.vue
+++ b/components/lib/cascadeselect/CascadeSelect.vue
@@ -1,6 +1,6 @@
 <template>
-    <div ref="container" :class="containerClass" @click="onContainerClick($event)">
-        <div class="p-hidden-accessible">
+    <div ref="container" :class="containerClass" @click="onContainerClick($event)" v-bind="ptm('root')">
+        <div class="p-hidden-accessible" v-bind="ptm('inputAria')">
             <input
                 ref="focusInput"
                 :id="inputId"
@@ -21,30 +21,30 @@
                 @focus="onFocus"
                 @blur="onBlur"
                 @keydown="onKeyDown"
-                v-bind="inputProps"
+                v-bind="{ ...inputProps, ...ptm('input') }"
             />
         </div>
-        <span :class="labelClass">
+        <span :class="labelClass" v-bind="ptm('label')">
             <slot name="value" :value="modelValue" :placeholder="placeholder">
                 {{ label }}
             </slot>
         </span>
-        <div class="p-cascadeselect-trigger" role="button" tabindex="-1" aria-hidden="true">
+        <div class="p-cascadeselect-trigger" role="button" tabindex="-1" aria-hidden="true" v-bind="ptm('dropdownButton')">
             <slot v-if="loading" name="loadingicon" class="p-cascadeselect-trigger-icon">
-                <span v-if="loadingIcon" :class="['p-cascadeselect-trigger-icon pi-spin', loadingIcon]" aria-hidden="true" />
-                <SpinnerIcon v-else class="p-cascadeselect-trigger-icon" spin aria-hidden="true" />
+                <span v-if="loadingIcon" :class="['p-cascadeselect-trigger-icon pi-spin', loadingIcon]" aria-hidden="true" v-bind="ptm('loadingIcon')" />
+                <SpinnerIcon v-else class="p-cascadeselect-trigger-icon" spin aria-hidden="true" v-bind="ptm('loadingIcon')" />
             </slot>
             <slot v-else name="dropdownicon" class="p-cascadeselect-trigger-icon">
-                <component :is="dropdownIcon ? 'span' : 'ChevronDownIcon'" :class="['p-cascadeselect-trigger-icon', dropdownIcon]" aria-hidden="true" />
+                <component :is="dropdownIcon ? 'span' : 'ChevronDownIcon'" :class="['p-cascadeselect-trigger-icon', dropdownIcon]" aria-hidden="true" v-bind="ptm('dropdownIcon')" />
             </slot>
         </div>
-        <span role="status" aria-live="polite" class="p-hidden-accessible">
+        <span role="status" aria-live="polite" class="p-hidden-accessible" v-bind="ptm('searchResultAria')">
             {{ searchResultMessageText }}
         </span>
         <Portal :appendTo="appendTo">
             <transition name="p-connected-overlay" @enter="onOverlayEnter" @after-enter="onOverlayAfterEnter" @leave="onOverlayLeave" @after-leave="onOverlayAfterLeave">
-                <div v-if="overlayVisible" :ref="overlayRef" :style="panelStyle" :class="panelStyleClass" @click="onOverlayClick" @keydown="onOverlayKeyDown" v-bind="panelProps">
-                    <div class="p-cascadeselect-items-wrapper">
+                <div v-if="overlayVisible" :ref="overlayRef" :style="panelStyle" :class="panelStyleClass" @click="onOverlayClick" @keydown="onOverlayKeyDown" v-bind="{ ...panelProps, ...ptm('panel') }">
+                    <div class="p-cascadeselect-items-wrapper" v-bind="ptm('wrapper')">
                         <CascadeSelectSub
                             :id="id + '_tree'"
                             role="tree"
@@ -62,10 +62,11 @@
                             :optionGroupLabel="optionGroupLabel"
                             :optionGroupChildren="optionGroupChildren"
                             @option-change="onOptionChange"
+                            :pt="pt"
                         />
                     </div>
 
-                    <span role="status" aria-live="polite" class="p-hidden-accessible">
+                    <span role="status" aria-live="polite" class="p-hidden-accessible" v-bind="ptm('selectedMessageAria')">
                         {{ selectedMessageText }}
                     </span>
                 </div>
@@ -75,6 +76,7 @@
 </template>
 
 <script>
+import BaseComponent from 'primevue/basecomponent';
 import AngleRightIcon from 'primevue/icons/angleright';
 import ChevronDownIcon from 'primevue/icons/chevrondown';
 import SpinnerIcon from 'primevue/icons/spinner';
@@ -85,6 +87,7 @@ import CascadeSelectSub from './CascadeSelectSub.vue';
 
 export default {
     name: 'CascadeSelect',
+    extends: BaseComponent,
     emits: ['update:modelValue', 'change', 'focus', 'blur', 'click', 'group-change', 'before-show', 'before-hide', 'hide', 'show'],
     props: {
         modelValue: null,
diff --git a/components/lib/cascadeselect/CascadeSelectSub.vue b/components/lib/cascadeselect/CascadeSelectSub.vue
index 29ae461f2..baed70c20 100644
--- a/components/lib/cascadeselect/CascadeSelectSub.vue
+++ b/components/lib/cascadeselect/CascadeSelectSub.vue
@@ -1,5 +1,5 @@
 <template>
-    <ul class="p-cascadeselect-panel p-cascadeselect-items">
+    <ul class="p-cascadeselect-panel p-cascadeselect-items" v-bind="ptm('list')">
         <template v-for="(processedOption, index) of options" :key="getOptionLabelToRender(processedOption)">
             <li
                 :id="getOptionId(processedOption)"
@@ -11,10 +11,11 @@
                 :aria-level="level + 1"
                 :aria-setsize="options.length"
                 :aria-posinset="index + 1"
+                v-bind="ptm('item')"
             >
-                <div v-ripple class="p-cascadeselect-item-content" @click="onOptionClick($event, processedOption)">
+                <div v-ripple class="p-cascadeselect-item-content" @click="onOptionClick($event, processedOption)" v-bind="ptm('content')">
                     <component v-if="templates['option']" :is="templates['option']" :option="processedOption.option" />
-                    <span v-else class="p-cascadeselect-item-text">{{ getOptionLabelToRender(processedOption) }}</span>
+                    <span v-else class="p-cascadeselect-item-text" v-bind="ptm('text')">{{ getOptionLabelToRender(processedOption) }}</span>
                     <component
                         v-if="isOptionGroup(processedOption)"
                         :is="templates['optiongroupicon'] ? templates['optiongroupicon'] : optionGroupIcon ? 'span' : 'AngleRightIcon'"
@@ -39,6 +40,7 @@
                     :optionGroupLabel="optionGroupLabel"
                     :optionGroupChildren="optionGroupChildren"
                     @option-change="onOptionChange"
+                    :pt="pt"
                 />
             </li>
         </template>
@@ -46,12 +48,14 @@
 </template>
 
 <script>
+import BaseComponent from 'primevue/basecomponent';
 import AngleRightIcon from 'primevue/icons/angleright';
 import Ripple from 'primevue/ripple';
 import { DomHandler, ObjectUtils } from 'primevue/utils';
 
 export default {
     name: 'CascadeSelectSub',
+    extends: BaseComponent,
     emits: ['option-change'],
     props: {
         selectId: String,
diff --git a/components/lib/config/PrimeVue.d.ts b/components/lib/config/PrimeVue.d.ts
index 083bcf7bc..fb77c2b15 100644
--- a/components/lib/config/PrimeVue.d.ts
+++ b/components/lib/config/PrimeVue.d.ts
@@ -10,6 +10,7 @@ import { ButtonPassThroughOptions } from '../button';
 import { CalendarPassThroughOptions } from '../calendar';
 import { CardPassThroughOptions } from '../card';
 import { CarouselPassThroughOptions } from '../carousel';
+import { CascadeSelectPassThroughOptions } from '../cascadeselect';
 import { ChartPassThroughOptions } from '../chart';
 import { ChipPassThroughOptions } from '../chip';
 import { ConfirmDialogPassThroughOptions } from '../confirmdialog';
@@ -79,6 +80,7 @@ interface PrimeVuePTOptions {
     calendar?: CalendarPassThroughOptions;
     card?: CardPassThroughOptions;
     carousel?: CarouselPassThroughOptions;
+    cascadeselect?: CascadeSelectPassThroughOptions;
     chart?: ChartPassThroughOptions;
     chip?: ChipPassThroughOptions;
     confirmdialog?: ConfirmDialogPassThroughOptions;