Molly Sims tweets, "Finally bikini ready & pulling out those Sports Illustrated swimsuit poses."

Molly Sims recently confessed she was a bit jealous of Claire Danes' post pregnancy body, but looking at her latest photo on Twitter, she would have little to be jealous about.

Just like Claire, Molly looks fabulous.

Sims gave birth to her son Brooks seven months ago and she posted a photo of her slender body in a black bikini while on vacation in Mexico Saturday with her girlfriends.

"Finally bikini ready & pulling out those Sports Illustrated swimsuit poses, just in time for my bestie Lauren's big bday!" she Tweeted.

Molly earlier said she is struggling to lose weight seven months after having her son.

She told Us Weekly: "I'm still about 10 pounds away and my baby is seven months. And I look at Claire Danes at the Globes and I'm like, I hate you.”

Molly, 39, revealed she has had to work extra hard to lose the baby weight because of a thyroid problem.

She said: "My thyroid kind of shut down, so that really made it very difficult in terms of the weight loss.

“The problem is…you can't [cut back your diet] until you stop breastfeeding, and I stopped at three months because I had no milk.

“[Some] women will say, 'Oh my god, it's so easy, and I eat M&Ms and I breastfeed all day long,' and that's just not true.”

(Image: Twitter / Molly Sims)