The 39-year-old and her producer husband Jason Goldberg have become parents to a son, who she introduced to fans on Instagram.com on Wednesday (18May16).

"Welcome to the world our sweet baby boy Story..." the star wrote beside a black and white image of herself cradling her newborn, as Jason rests his head next to the pair.

The couple is already parents to daughters Poet Sienna, 10, and Jagger Joseph Blue, eight, and two-year-old son Lyric Sonny Rhodes.

Soleil announced her fourth pregnancy in November (15), and admitted the latest addition to the family wasn't planned.

She told People.com, "This was definitely a really happy surprise. It was not something we were planning on, and yet, we could not be more excited and thrilled."

The couple has been married since 1998.