Kourtney Kardashian is back in a bikini six months after welcoming her second child, baby girl Penelope.

Kourtney Kardashian, 33, posed by the pool in Miami on December 13 for the cover of Us Weekly wearing a yellow swimsuit.

The 5ft brunette, who gave birth to Penelope on July 8, now weighs in at 106 lbs after shedding 44 lbs of baby weight.

Kourtney Kardashian, who also has a son Mason, 3, with partner Scott Disick, admits that getting back into shape wasn’t easy.

“It was harder to lose weight the second time around,” she says.

“I gained 45 pounds with Penelope.”

Kourtney Kardashian is back in a bikini six months after welcoming her second child

Kourtney Kardashian turned to Tracy Anderson’s 90-minute dance-focused workouts and small portion sizes to shed the weight.

“This time, the focus is really on being a mom and being present, knowing my priorities,” she said.

The full interview with Kourtney Kardashian is in the new issue of Us Weekly on newsstands Friday.