“Stay COOL, peeps!!! #dangitshot #bundlelove,” The Hills alum, 32, captioned the fashion photo of her chic maternity style.
Last month, the former reality star and husband, producer Tim Rosenman, celebrated a co-ed baby shower with friends and family on the rooftop of the SIXTY Beverly Hills Hotel.
In February, the MTV star announced her first pregnancy.
It’s a Hills baby boom! Whitney’s former costar Lauren Conrad welcomed her first child – son Liam James Tell – on July 5. And Heidi Montag and Spencer Pratt are currently expecting their first child – a son – in the fall.