Brody Jenner and Tia Blanco announces to social media that they are expecting their first baby.

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In a joint Instagram post on New Year's Day, the couple announced that they had a "little angel" on the way.

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Brody's brother Brandon, who has three children, said: "Welcome to the little family! We have lots of cousins waiting for you."

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And, Heidi Montag, who co-starred with Brody, 39, on 'The Hills', wrote: "You two couldn't be happier!!!!!! Congratulations!!!!"

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Brody and professional surfer Tia, who have been dating since last year, also shared a video of them getting a sonogram as Brody said: "Honey, look at that little heart - what?"

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Brody's parents are former model Linda and reality TV star Caitlyn Jenner - who was previously married to Kris Jenner.

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The couple shared a video of their recent doctor's visit, during which they got a chance to hear their baby's heartbeat.

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The pregnancy news comes nearly seven months after the couple first confirmed their romance on social media with a cozy photo.

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"We kept our relationship pretty private at the beginning," Tia said in an interview last November to the news.

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