Recent reports claim that Ashlee Simpson is pregnant. Sources confirm that the singer/actress is expecting a child with her fiancee, Fall Out Boy bassist Pete Wentz. The couple has been dating since 2006 and were just engaged to be married last week.

A spokesperson told Usmagazine.com, "We Are thrilled to confirm their engagement and congratulate this happy couple," but would not comment on Simpson's reported pregnancy. Representatives for the couple had not commented at press time.

The "Outta My Head" singer is the younger sister of pop star/actress Jessica Simpson and will be releasing her third album, Bittersweet World on April 22.

Simpson isn't the first celebrity 'little sis' to get pregnant. Jamie Lynn Spears, younger sister of pop princess Britney, announced her pregnancy in December; and Solange Knowles, younger sister of singer Beyonce, gave birth to a son two years ago.

-Ashlee Simpson Pictures