Rumors are swirling that Blake Lively is pregnant with her first child with husband and fellow actor Ryan Reynolds.

A report by OK Magazine quotes an unnamed inside source who claimed Lively is currently expecting.

"It's pretty obvious Blake is expecting a baby. We're convinced she's just waiting to pass the first trimester before she makes an official announcement. Blake's usually a size 2 or 4 and loves to show off her body in fitted clothes, but now she is going for looser, more draped fits," said the source. "She enjoys a little champagne and red wine, but for the last couple weeks, it's only been water."

That wouldn't be strange, since Lively has long expressed her interest in having plenty of children.

"I've always wanted a big family. I'd love 30 if I could," she told Allure magazine back in September. That same month, Lively married Reynolds in a small and intimate ceremony in South Carolina.

However, Lively's own rep denies the rumors. "The story is 100 percent false. Blake is not pregnant," said the rep.

Of course, plenty of couples wait to announce they're expecting until several months into a pregnancy, so it's possible that the denial is just a bid for a little more privacy, at least until Lively's belly makes it completely undeniable.

Either way, there's plenty of time for the couple to pop out as many babies as they like. Reynolds is 36, but Lively is only 25, so she has many more baby-making years ahead of her.