Ashlee Simpson is pregnant, a source confirmed to Usmagazine.com.

The singer, 23, is expecting her first child with fiancé Pete Wentz, 28.

Simpson and the Fall Out Boy frontman announced their engagement Wednesday.

“We are thrilled to confirm their engagement and congratulate this happy couple,” a spokesperson for the couple told Us. “Beyond that there is nothing to say.”

Simpson’s rep had no comment.

Source

UPDATE: Pete Wentz denies that Ashlee is pregnant.

In an e-mail to MTV News, Wentz denied reports that surfaced Monday (April 14) on the Web sites of OK! magazine and Us Weekly that he and Simpson, 23, are expecting their first child.

“There is a witch hunt for people to be pregnant whenever they get engaged in Hollywood,” he wrote. “This is all news to me. I can’t wait for the story about how I’m really in a gay relationship and this is all just a cover. … I mean really, this is crazy. … I mean we’re engaged, that’s true, and happy about it.”

Asked again if he was denying reports that Simpson is pregnant, Wentz, 28, replied, “Yeah.”