diff --git a/src/components/timeline/Timeline.d.ts b/src/components/timeline/Timeline.d.ts
index 4a5ee2874..619237033 100644
--- a/src/components/timeline/Timeline.d.ts
+++ b/src/components/timeline/Timeline.d.ts
@@ -1,25 +1,104 @@
 import { VNode } from 'vue';
+import { ClassComponent, GlobalComponentConstructor } from '../ts-helpers';
 
-interface TimelineProps {
-    value?: any[];
-    align?: string;
-    layout?: string;
-    dataKey?: string;
+type TimelineVerticalAlignType = 'left' | 'right';
+
+type TimelineHorizontalAlignType = 'top' | 'bottom';
+
+type TimelineAlignType = TimelineVerticalAlignType | TimelineHorizontalAlignType;
+
+type TimelineLayoutType = 'vertical' | 'horizontal';
+
+export interface TimelineProps {
+    /**
+     * An array of events to display.
+     */
+    value?: any[] | undefined;
+    /**
+     * Position of the timeline bar relative to the content.
+     * @see TimelineAlignType
+     * Default value is 'left'.
+     */
+    align?: TimelineAlignType;
+    /**
+     * Orientation of the timeline.
+     * @see TimelineLayoutType
+     * Default value is 'horizontal'.
+     */
+    layout?: TimelineLayoutType;
+    /**
+     * Name of the field that uniquely identifies the a record in the data.
+     */
+    dataKey?: string | undefined;
 }
 
-interface TimelineSlotInterface {
-    item: any;
-    index: number;
+export interface TimelineSlots {
+    /**
+     * Custom content template
+     * @param {Object} scope - content slot's params.
+     */
+    content: (scope: {
+        /**
+         * Item data
+         */
+        item: any;
+        /**
+         * Index of item
+         */
+        index: number;
+    }) => VNode[];
+    /**
+     * Custom opposite template.
+     * @param {Object} scope - opposite slot's params.
+     */
+    opposite: (scope: {
+        /**
+         * Item data
+         */
+        item: any;
+        /**
+         * Index of item
+         */
+        index: number;
+    }) => VNode[];
+    /**
+     * Custom marker template.
+     * @param {Object} scope - marker slot's params.
+     */
+    marker: (scope: {
+        /**
+         * Item data
+         */
+        item: any;
+        /**
+         * Index of item
+         */
+        index: number;
+    }) => VNode[];
+    /**
+     * Custom connector template.
+     */
+    connector: () => VNode[];
 }
 
-declare class Timeline {
-    $props: TimelineProps;
-    $slots: {
-        content: TimelineSlotInterface;
-        opposite: TimelineSlotInterface;
-        marker: TimelineSlotInterface;
-        connector: VNode[];
+export declare type TimelineEmits = {
+}
+
+declare class Timeline extends ClassComponent<TimelineProps, TimelineSlots, TimelineEmits> { }
+
+declare module '@vue/runtime-core' {
+    interface GlobalComponents {
+        Timeline: GlobalComponentConstructor<Timeline>
     }
 }
 
+/**
+ *
+ * Timeline visualizes a series of chained events.
+ *
+ * Demos:
+ *
+ * - [Timeline](https://www.primefaces.org/primevue/showcase/#/timeline)
+ *
+ */
 export default Timeline;