Los Angeles: American comedian-actress Chelsea Handler has sparked rumours that she's pregnant.

She took to her Instagram page Monday night to post an image of her dog sitting in a car and staring at the camera. She captioned it: "It's like a 24 hour watch. He must know I'm pregnant", reports aceshowbiz.com.

Her post has led to speculation that she's expecting a baby.

A fan reacted to her post: "Part of me thinks you're full of s**t and part of me thinks this is the only way you'd announce it!".

However, an official announcement from Handler's representative is yet to be made.