Blonde bombshell Anna Nicole Smith is dropping a baby bomb!

After weeks of speculation surrounding her ever so slightly growing tummy, Smith said via her website, AnnaNicole.com, "Let me stop all the rumors. Yes, I am pregnant."

The famous Guess girl and infamous widow of billionaire J. Howard Marshall was beaming as she issued the stunning announcement while sunbathing on a raft in her swimming pool. "I'm happy. I'm very, very happy about it," Smith continued.

So who's the daddy? "Extra" has uncovered the mystery man is celebrity photographer Larry Birkhead.

Birkhead, who took some sexy snapshots of Anna, has signed a confidentiality agreement, but he told TMZ.com: "I have been told that I am expecting a child, I have seen the ultrasound. I am very excited about the possibility of becoming a father."

As for Anna, she already has a 20-year-old son, Daniel, who starred in her reality TV show with her.

The new mom-to-be is staying mum on the delivery details, choosing to keep the delivery date and the sex of the baby secret. But if the gene pool stays true, you can count on another life in spotlight!