Celebrity stylist turned designer Rachel Zoe and her husband Rodger Berman welcomed another boy on Sunday, Dec. 22, she announced via Twitter.

"So excited to welcome our baby boy into the world ... he's 7 lbs., 12 oz., beautiful, healthy and we couldn't be happier," Zoe, 42, wrote.

The couple have named their son Kaius Jagger Berman and will call him Kai, Zoe announced on her website. "Rodger, Skyler and I are madly in love and will be happily hibernating for the next couple of weeks. Thank you for all of your kind words, as they mean so much to us."

After weeks of speculation that she was expecting, Zoe confirmed the pregnancy in September. She and Berman already have a son named Skyler Morrison, 2½.

In an interview with Us Weekly when Zoe was nearing the end of her pregnancy, she talked about being excited to welcome her second child.

"It's wonderful. It's great," Zoe said of her second pregnancy. "I mean, I'm literally 9 months pregnant so this I think will probably be one of my last outings. I'm going into hibernation!"

"I'm tired," she added. "It's really hard to get really dressed up, but it's like you do it when it's important and tonight is really important."

Zoe also said that Skyler taking on the role of being a big brother.

"I think he is getting there," she explained. "He gets it that there is a baby inside me. It's taken a while to get him there, but he is getting there."

Tags: Rachel Zoe