Credit: Instagram Photo: Frankie Delgado With Fellow The Hills Alum Lauren Conrad and His Pregnant Wife Jennifer in February 2014

Congratulations and best wishes to The Hills alum Frankie Delgado, 32, and his wife Jennifer Acosta, who are expecting their first child!

An insider told Us Weekly they will welcome a baby girl this summer. You can catch a little glimpse of pregnant Jennifer's baby bump in the photo shown, which is from Hills star Lauren Conrad's birthday party. Frankie shared the pic on February 7, writing, "Such a fun HOEDOWN bday party with my amazing friend @Laurenconrad and wifey @jennifermdelgado #yeeehaaa."

Frankie and Jennifer got married back in June, just a week after another Hills co-star, Kristin Cavallari, married Jay Cutler. Frankie's wedding took place at Rancho Las Lomas near Dana Point in California and was attended by LC, of course, plus Brody Jenner and Reggie Bush. (Frankie has been on Keeping Up With The Kardashians with his buddy Brody.)

Speaking of marriages, though, Lauren should be the next to walk down the aisle, and she just shared a romantic engagement photo with her fiancé William Tell. Everybody's growing up, finding love, havin' kids, and getting all domestic!

Anyway, Us’s source said Frankie is “so excited for the baby.” She’ll be his little princess, for sure. Congrats to the growing family!

Sources: Us Weekly, Instagram