Ashlee Simpson and Pete Wentz: Expecting a Girl!

On the same morning in which we confirmed that Ben Affleck got Jennifer Garner pregnant again, we've learned that Ashlee Simpson and Pete Wentz are expecting a baby girl on October 31 - and the excited daddy-to-be is already sewing clothes!

"Ashlee and Pete are on cloud nine," an insider told Star.

They actually conceived the baby just before Valentine's Day while they were on vacation and the baby has an initial due date of October 31.

The source says when Pete heard she might have the baby on Halloween, "he went nuts. For an emo-rocker type like Pete, that would be just too perfect!"

So true, so true. Expect Jessica Simpson to pull the goalie on Tony Romo, Bridget Moynahan style, in an attempt to steal the spotlight back from her sis.