Pete Wentz: 'Jessica Simpson is in love'

Pete Wentz has said that his sister-in-law Jessica Simpson is "so happy" with her boyfriend Eric Johnson.

The Fall Out Boy rocker revealed that Simpson's relationship with Johnson - which was first reported in July - has had a wonderful effect on the singer.

"He's a really smart guy, and Jessica really loves him," Wentz told People.

"I think that's the most important thing, seeing her happy."

Simpson recently confessed that her relationship with Johnson has helped her to feel comfortable with herself.