Preg Hilary Duff Tells Ellen, "It's A Boy!"

Michael Rozman/Warner Bros.

Glowing mommy-to-be Hilary Duff stopped by The Ellen DeGeneres Show to promote her new book, 'Devoted', and she also revealed a big surprise: she's having a boy!

The Beauty and the Briefcase star, who is four months along, announced the baby's sex for the first time on Ellen, revealing:

"I wanted to tell you first, I just found out. It’s a boy! I had feeling it was a boy the whole time."

Duff also spilled the deets on how she told her hockey pro hubby, Mike Comrie, the big baby news.

"My husband makes this joke that I think I’m pregnant like 12 times a year. Every since we got married, he’s like, you always think this blah, blah, blah. So when it actually happened he was in the shower. I think sometimes when you imagine it you think you’re going to do it in some cute way….I just ran in and he was in the shower and I just held up the test and I was like, oh my god. And he was like AHH! He was soaking wet. We were just like a mess and started crying. It was really exciting."

Once the actress wraps up her book tour, she's going to enjoy some major R&R until the baby's due in March.

Congrats Hil!