Jessica Alba is the latest celebrity to join the Hollywood baby boom. The actress took to her Facebook page Wednesday morning to announce she's expecting her second child with husband Cash Warren.

"I thought I'd drop by to let you all in on some exciting news – Honor is going to be a Big Sister!" she wrote. "Cash and I are thrilled and wanted to share the news directly with you so you didn't hear about it somewhere else."

Alba, 29, and Warren, 32, met on the set of 2004's "Fantastic Four" and got engaged three years later. They quietly wed at the Beverly Hills courthouse in May 2008, two months before welcoming daughter Honor.