Molly Sims is looking great!

Just seven months after giving birth to son Brooks, the 39-year-old model posted a  pic of herself looking fab in a black bikini.

_{(Image via Twitter)}

“Finally bikini ready & pulling out those Sports Illustrated swimsuit poses, just in time for my bestie Lauren’s big bday,” she tweeted.

Sims took a break from her mommy duties, leaving Brooks and husband Scott Stuber at home for a “girlfriends getaway” in Playa del Carmen this weekend.

“Viva Mexico … OLE!” she added.

The Project Accessory host has previously opened up about her battle to shed the 65 pounds she gained during her pregnancy.

“I developed a thyroid condition during my pregnancy, so I didn’t realize why I was gaining so much weight,” she told Us Weekly last week. “So now I’m on thyroid medicine. My thyroid kind of shut down, so that really made it very difficult in terms of the weight loss.”

“It’s been difficult, I’m not going to lie. I’ve had to exercise and keep a very, very rigid diet. I mean, it’s the hardest thing I’ve done – and I’ve modeled since I was pretty much 21 years old!”

Sims also shared that she was envious of how quickly actress Claire Danes snapped back into shape following the birth of her son.

“I look at Claire Danes at the Globes and I’m like, I hate you.  “I’m jealous [of women like Danes]. I wish to God I could have done it that way. But my body just didn’t.”

“I’m so happy I have an amazing, happy, healthy, gorgeous, Buddha-like son, but I wish it would have been easier. I tell my husband, it made me depressed a little.”

Did you struggle to get your body back after baby?