Looks like billionaire heiress Petra Ecclestone will soon have a little heir or heiress of her own!

The 23-year-old socialite -- daughter of Formula One mogul Bernie Ecclestone -- is currently pregnant with her first child, a source confirmed to Us Weekly. The baby-to-be's father is entrepreneur James Stunt, whom Ecclestone married in August 2011 after four years of dating.

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"She is really excited to become a mom," the insider told Us.

The British-born beauty, recently called "Hollywood's new billionaire Queen Bee" by W Magazine, has yet to actually announce the pregnancy in public, but photos of the blonde heiress clearly show her growing baby bump.

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On Nov. 27, the soon-to-be first-time mom was spotted out and about in Los Angeles, with her protruding belly on full display in a clingy light-grey top, black leggings and a printed scarf.

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Ecclestone and her husband moved to Southern California in July 2011, one month before tying the knot in a lavish ceremony at the Odescalchi Castle near Rome, Italy. They currently live in Aaron and Candy Spelling's former home, a 56,500-square-foot manor in L.A.'s Holmby Hills.

This article originally appeared on Usmagazine.com: Petra Ecclestone, Billionaire Heiress, Is Pregnant: See Her Bump!