By Kelsey Glein
Updated Feb 09, 2017 @ 6:45 pm
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Congratulations are in order for Whitney Port and her husband Tim Rosenman—the couple is expecting their first child together.

The fashion designer took to Instagram today to share the exciting news, posting a picture of herself showing off her budding baby bump in a cropped white T-shirt and lace underwear. "Oh hey! Just standing by the window in my underwear, with a BABY in my belly!!! DM me if you know what I'm supposed to do with this thing for how ever many years I'm supposed to be in charge," she wrote alongside the gorgeous snap. "Check out my blog for a little letter from me & Timmy and for more behind the scenes of this crazy journey!!!! We are sooooo excited!!!!"

VIDEO: Chic Celebrity Maternity Fashion

Port and Rosenman tied the knot back on November 7, 2015 in a stunning Palm Springs, Calif., wedding surrounded by family and friends. And it just so happens the blonde beauty isn't the only current alum of The Hills who is currently pregnant—her former co-star Lauren Conrad revealed just last month that she is preparing to welcome her first child into the world.

We can't wait to see more of her sure-to-be chic maternity style.