diff --git a/api-generator/components/autocomplete.js b/api-generator/components/autocomplete.js
index 14412ab63..e012096b8 100644
--- a/api-generator/components/autocomplete.js
+++ b/api-generator/components/autocomplete.js
@@ -250,6 +250,12 @@ const AutoCompleteProps = [
         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/autocomplete/AutoComplete.d.ts b/components/lib/autocomplete/AutoComplete.d.ts
index ddfd2caea..1c2bd0edb 100755
--- a/components/lib/autocomplete/AutoComplete.d.ts
+++ b/components/lib/autocomplete/AutoComplete.d.ts
@@ -8,8 +8,19 @@
  *
  */
 import { HTMLAttributes, InputHTMLAttributes, VNode } from 'vue';
+import { ButtonPassThroughOptionType } from '../button';
 import { ClassComponent, GlobalComponentConstructor } from '../ts-helpers';
-import { VirtualScrollerItemOptions, VirtualScrollerProps } from '../virtualscroller';
+import { VirtualScrollerItemOptions, VirtualScrollerPassThroughOptionType, VirtualScrollerProps } from '../virtualscroller';
+
+export declare type AutoCompletePassThroughOptionType = AutoCompletePassThroughAttributes | ((options: AutoCompletePassThroughMethodOptions) => AutoCompletePassThroughAttributes) | null | undefined;
+
+/**
+ * Custom passthrough(pt) option method.
+ */
+export interface AutoCompletePassThroughMethodOptions {
+    props: AutoCompleteProps;
+    state: AutoCompleteState;
+}
 
 /**
  * Custom change event.
@@ -78,6 +89,96 @@ export interface AutoCompleteCompleteEvent {
     query: string;
 }
 
+/**
+ * Custom passthrough(pt) options.
+ * @see {@link AutoCompleteProps.pt}
+ */
+export interface AutoCompletePassThroughOptions {
+    /**
+     * Uses to pass attributes to the root's DOM element.
+     */
+    root?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the input's DOM element.
+     */
+    input?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the container's DOM element.
+     */
+    container?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the token' DOM element.
+     */
+    token?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the token label's DOM element.
+     */
+    tokenLabel?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the remove token icon's DOM element.
+     */
+    removeTokenIcon?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the loading icon's DOM element.
+     */
+    loadingIcon?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the Button component.
+     */
+    dropdownButton?: ButtonPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the search result message's DOM element.
+     */
+    searchResultMessage?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the panel's DOM element.
+     */
+    panel?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the VirtualScroller component.
+     * @see {@link VirtualScrollerPassThroughOptionType}
+     */
+    virtualScroller?: VirtualScrollerPassThroughOptionType;
+    /**
+     * Uses to pass attributes to the list's DOM element.
+     */
+    list?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the item group's DOM element.
+     */
+    itemGroup?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the item's DOM element.
+     */
+    item?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the empty message's DOM element.
+     */
+    emptyMessage?: AutoCompletePassThroughOptionType;
+    /**
+     * Uses to pass attributes to the selected message's DOM element.
+     */
+    selectedMessage?: AutoCompletePassThroughOptionType;
+}
+
+/**
+ * Custom passthrough attributes for each DOM elements
+ */
+export interface AutoCompletePassThroughAttributes {
+    [key: string]: any;
+}
+
+/**
+ * Defines current inline state in AutoComplete component.
+ */
+export interface AutoCompleteState {
+    /**
+     * Current collapsed state as a boolean.
+     * @defaultValue false
+     */
+    d_collapsed: boolean;
+}
+
 /**
  * Defines valid properties in AutoComplete component.
  */
@@ -274,6 +375,11 @@ export interface AutoCompleteProps {
      * Identifier of the underlying input element.
      */
     'aria-labelledby'?: string | undefined;
+    /**
+     * Uses to pass attributes to DOM elements inside the component.
+     * @type {AutoCompletePassThroughOptions}
+     */
+    pt?: AutoCompletePassThroughOptions;
 }
 
 /**
diff --git a/components/lib/autocomplete/AutoComplete.vue b/components/lib/autocomplete/AutoComplete.vue
index 7768cd7c6..bbb1f8a5b 100755
--- a/components/lib/autocomplete/AutoComplete.vue
+++ b/components/lib/autocomplete/AutoComplete.vue
@@ -1,5 +1,5 @@
 <template>
-    <div ref="container" :class="containerClass" @click="onContainerClick">
+    <div ref="container" :class="containerClass" @click="onContainerClick" v-bind="ptm('root')">
         <input
             v-if="!multiple"
             ref="focusInput"
@@ -25,7 +25,7 @@
             @keydown="onKeyDown"
             @input="onInput"
             @change="onChange"
-            v-bind="inputProps"
+            v-bind="{ ...inputProps, ...ptm('input') }"
         />
         <ul
             v-if="multiple"
@@ -38,6 +38,7 @@
             @focus="onMultipleContainerFocus"
             @blur="onMultipleContainerBlur"
             @keydown="onMultipleContainerKeyDown"
+            v-bind="ptm('container')"
         >
             <li
                 v-for="(option, i) of modelValue"
@@ -49,15 +50,16 @@
                 :aria-selected="true"
                 :aria-setsize="modelValue.length"
                 :aria-posinset="i + 1"
+                v-bind="ptm('token')"
             >
                 <slot name="chip" :value="option">
-                    <span class="p-autocomplete-token-label">{{ getOptionLabel(option) }}</span>
+                    <span class="p-autocomplete-token-label" v-bind="ptm('tokenLabel')">{{ getOptionLabel(option) }}</span>
                 </slot>
                 <slot name="removetokenicon" class="p-autocomplete-token-icon" :onClick="(event) => removeOption(event, i)">
-                    <component :is="removeTokenIcon ? 'span' : 'TimesCircleIcon'" :class="['p-autocomplete-token-icon', removeTokenIcon]" @click="removeOption($event, i)" aria-hidden="true" />
+                    <component :is="removeTokenIcon ? 'span' : 'TimesCircleIcon'" :class="['p-autocomplete-token-icon', removeTokenIcon]" @click="removeOption($event, i)" aria-hidden="true" v-bind="ptm('removeTokenIcon')" />
                 </slot>
             </li>
-            <li class="p-autocomplete-input-token" role="option">
+            <li class="p-autocomplete-input-token" role="option" v-bind="ptm('token')">
                 <input
                     ref="focusInput"
                     :id="inputId"
@@ -81,33 +83,48 @@
                     @keydown="onKeyDown"
                     @input="onInput"
                     @change="onChange"
-                    v-bind="inputProps"
+                    v-bind="{ ...inputProps, ...ptm('input') }"
                 />
             </li>
         </ul>
         <slot v-if="searching" name="loadingicon">
-            <i v-if="loadingIcon" :class="['p-autocomplete-loader pi-spin', loadingIcon]" aria-hidden="true" />
-            <SpinnerIcon v-else class="p-autocomplete-loader" spin aria-hidden="true" />
+            <i v-if="loadingIcon" :class="['p-autocomplete-loader pi-spin', loadingIcon]" aria-hidden="true" v-bind="ptm('loadingIcon')" />
+            <SpinnerIcon v-else class="p-autocomplete-loader" spin aria-hidden="true" v-bind="ptm('loadingIcon')" />
         </slot>
-        <Button v-if="dropdown" ref="dropdownButton" type="button" tabindex="-1" :class="['p-autocomplete-dropdown', dropdownClass]" :disabled="disabled" aria-hidden="true" @click="onDropdownClick">
+        <Button v-if="dropdown" ref="dropdownButton" type="button" tabindex="-1" :class="['p-autocomplete-dropdown', dropdownClass]" :disabled="disabled" aria-hidden="true" @click="onDropdownClick" :pt="ptm('dropdownButton')">
             <template #icon>
                 <slot name="dropdownicon">
-                    <component :is="dropdownIcon ? 'span' : 'ChevronDownIcon'" :class="dropdownIcon" />
+                    <component :is="dropdownIcon ? 'span' : 'ChevronDownIcon'" :class="dropdownIcon" v-bind="ptm('dropdownButton')['icon']" />
                 </slot>
             </template>
         </Button>
-        <span role="status" aria-live="polite" class="p-hidden-accessible">
+        <span role="status" aria-live="polite" class="p-hidden-accessible" v-bind="ptm('searchResultMessage')">
             {{ 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" :class="panelStyleClass" :style="{ ...panelStyle, 'max-height': virtualScrollerDisabled ? scrollHeight : '' }" @click="onOverlayClick" @keydown="onOverlayKeyDown" v-bind="panelProps">
+                <div
+                    v-if="overlayVisible"
+                    :ref="overlayRef"
+                    :class="panelStyleClass"
+                    :style="{ ...panelStyle, 'max-height': virtualScrollerDisabled ? scrollHeight : '' }"
+                    @click="onOverlayClick"
+                    @keydown="onOverlayKeyDown"
+                    v-bind="{ ...panelProps, ...ptm('panel') }"
+                >
                     <slot name="header" :value="modelValue" :suggestions="visibleOptions"></slot>
-                    <VirtualScroller :ref="virtualScrollerRef" v-bind="virtualScrollerOptions" :style="{ height: scrollHeight }" :items="visibleOptions" :tabindex="-1" :disabled="virtualScrollerDisabled">
+                    <VirtualScroller :ref="virtualScrollerRef" v-bind="{ ...virtualScrollerOptions, ...ptm('virtualScroller') }" :style="{ height: scrollHeight }" :items="visibleOptions" :tabindex="-1" :disabled="virtualScrollerDisabled">
                         <template v-slot:content="{ styleClass, contentRef, items, getItemOptions, contentStyle, itemSize }">
-                            <ul :ref="(el) => listRef(el, contentRef)" :id="id + '_list'" :class="['p-autocomplete-items', styleClass]" :style="contentStyle" role="listbox">
+                            <ul :ref="(el) => listRef(el, contentRef)" :id="id + '_list'" :class="['p-autocomplete-items', styleClass]" :style="contentStyle" role="listbox" v-bind="ptm('list')">
                                 <template v-for="(option, i) of items" :key="getOptionRenderKey(option, getOptionIndex(i, getItemOptions))">
-                                    <li v-if="isOptionGroup(option)" :id="id + '_' + getOptionIndex(i, getItemOptions)" :style="{ height: itemSize ? itemSize + 'px' : undefined }" class="p-autocomplete-item-group" role="option">
+                                    <li
+                                        v-if="isOptionGroup(option)"
+                                        :id="id + '_' + getOptionIndex(i, getItemOptions)"
+                                        :style="{ height: itemSize ? itemSize + 'px' : undefined }"
+                                        class="p-autocomplete-item-group"
+                                        role="option"
+                                        v-bind="ptm('itemGroup')"
+                                    >
                                         <slot name="optiongroup" :option="option.optionGroup" :item="option.optionGroup" :index="getOptionIndex(i, getItemOptions)">{{ getOptionGroupLabel(option.optionGroup) }}</slot>
                                     </li>
                                     <li
@@ -124,13 +141,14 @@
                                         :aria-posinset="getAriaPosInset(getOptionIndex(i, getItemOptions))"
                                         @click="onOptionSelect($event, option)"
                                         @mousemove="onOptionMouseMove($event, getOptionIndex(i, getItemOptions))"
+                                        v-bind="ptm('item')"
                                     >
                                         <slot v-if="$slots.option" name="option" :option="option" :index="getOptionIndex(i, getItemOptions)">{{ getOptionLabel(option) }}</slot>
                                         <slot v-else name="item" :item="option" :index="getOptionIndex(i, getItemOptions)">{{ getOptionLabel(option) }}</slot>
                                         <!--TODO: Deprecated since v3.16.0-->
                                     </li>
                                 </template>
-                                <li v-if="!items || (items && items.length === 0)" class="p-autocomplete-empty-message" role="option">
+                                <li v-if="!items || (items && items.length === 0)" class="p-autocomplete-empty-message" role="option" v-bind="ptm('emptyMessage')">
                                     <slot name="empty">{{ searchResultMessageText }}</slot>
                                 </li>
                             </ul>
@@ -140,7 +158,7 @@
                         </template>
                     </VirtualScroller>
                     <slot name="footer" :value="modelValue" :suggestions="visibleOptions"></slot>
-                    <span role="status" aria-live="polite" class="p-hidden-accessible">
+                    <span role="status" aria-live="polite" class="p-hidden-accessible" v-bind="ptm('selectedMessage')">
                         {{ selectedMessageText }}
                     </span>
                 </div>
@@ -150,6 +168,7 @@
 </template>
 
 <script>
+import BaseComponent from 'primevue/basecomponent';
 import Button from 'primevue/button';
 import ChevronDownIcon from 'primevue/icons/chevrondown';
 import SpinnerIcon from 'primevue/icons/spinner';
@@ -162,6 +181,7 @@ import VirtualScroller from 'primevue/virtualscroller';
 
 export default {
     name: 'AutoComplete',
+    extends: BaseComponent,
     emits: ['update:modelValue', 'change', 'focus', 'blur', 'item-select', 'item-unselect', 'dropdown-click', 'clear', 'complete', 'before-show', 'before-hide', 'show', 'hide'],
     props: {
         modelValue: null,
diff --git a/components/lib/config/PrimeVue.d.ts b/components/lib/config/PrimeVue.d.ts
index af1768cdc..083bcf7bc 100644
--- a/components/lib/config/PrimeVue.d.ts
+++ b/components/lib/config/PrimeVue.d.ts
@@ -1,6 +1,7 @@
 import { Plugin } from 'vue';
 import { AccordionPassThroughOptions } from '../accordion';
 import { AccordionTabPassThroughOptions } from '../accordiontab';
+import { AutoCompletePassThroughOptions } from '../autocomplete';
 import { AvatarPassThroughOptions } from '../avatar';
 import { BadgePassThroughOptions } from '../badge';
 import { BlockUIPassThroughOptions } from '../blockui';
@@ -69,6 +70,7 @@ interface PrimeVueZIndexOptions {
 interface PrimeVuePTOptions {
     accordion?: AccordionPassThroughOptions;
     accordiontab?: AccordionTabPassThroughOptions;
+    autocomplete?: AutoCompletePassThroughOptions;
     avatar?: AvatarPassThroughOptions;
     badge?: BadgePassThroughOptions;
     blockui?: BlockUIPassThroughOptions;