Nicky Hilton Pregnant With First Child!

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Another Hilton heiress is on the way.

Nicky Hilton Rothschild is pregnant with her first child with her husband, James Rothschild, a source close to the stylish star tells ET. She is due in the summer, the source adds.

WATCH: Nicky Hilton's Valentino Wedding Dress Is Absolutely Stunning

Hilton, 32, married Rothschild -- an heir to one of Europe's greatest banking families -- last July in a lavish ceremony at Kensington Palace in London. The two have been dating since 2011.

While Hilton has made no announcement of the big news, her latest selfie on Instagram taken a week ago shows her in a long coat over a black dress and leggings, making it impossible to distinguish a possibly baby bump.

She also looked as slim as ever on New Year's Eve, sporting a printed babydoll wrap dress and thigh-high black boots.

ET has reached out to Hilton for comment.

WATCH: Nicky Hilton Bares Her Butt in Serious Versace Wardrobe Malfunction

Watch the video below for a look back at Hilton's stunning long-sleeved, lace Valentino wedding dress, which took our top spot for the best celeb wedding dress of 2015!