Rachel Zoe welcomes baby boy

Rodger Berman and Rachel Zoe with Kaius. Picture: The Zoe Report

Christmas came early for celebrity stylist Rachel Zoe, who welcomed her second son yesterday.

The 42-year-old announced the happy news on Twitter after confirming her and husband Rodger Berman were expecting in September.

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

Zoe later announced in a post on her website they had named the tot Kaius Jagger, nicknamed "Kai".

"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."

The new addition makes two-year-old Skyler a big brother, but Zoe previously said her first born was not excited at the prospect.

"He understands a little [about the pregnancy] and I don't think he is that happy about it," Zoe told E! News.

"He does not want to share his mommy. He doesn't even want to share his mommy with his daddy, you know? He's a little possessive."

Ever the style icon, the fashion designer and stylist, whose clients include Cameron Diaz, Kate Hudson and Anne Hathaway, was seen wearing sky-high stilettos up to her ninth month of pregnancy.