Just when you thought the world was already chock-full of idiots…

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.

I guess being engaged makes the child slightly less bastardy.