Kim Kardashian  spandex pilates blonde sunglasses baby weight post baby

Looking good hot mama! Kim Kardashian is finally showing off those famous curves again! On Tuesday, the Keeping Up with the Kardashians star kicked her fit form into high gear when she went to a Pilates class in Studio City, Calif.

After giving birth to baby North West on June 15 -- the reality star has worn a plethora of bulky ensembles. But now that the 32-year-old mom has some shed some pregnancy weight, she is flaunting her hot bod'. Outfitted in black leggings and a black top, Kim K is clearly working hard to get back into fighting shape.

"I've actually been doing the Atkins diet & luv it," the curvy reality star tweeted on Sunday when a follower asked how she lost the weight.

"She is eating lots of lean proteins, healthy fats like nuts and avocado, carbs, fruits, veggies and cheese," a rep for Atkins told Us Weekly. "She wanted to be a healthy, nursing mom and not toxify her milk with her diet or lose weight too quickly. She's been doing Atkins since her doctor approved it at the end of June."

Way to go Kimmy! Keep up the good work -- we are sure Kanye appreciates it!