Pete Wentz moves on from Ashlee Simpson

Ashlee Simpson has found new love with Boardwalk Empire actor Vincent Piazza, and it appears that her ex-husband, former Fall Out Boy and current Black Cards frontman, Pete Wentz has found a new love, too.

Wentz was spotted taking his son Bronx to the playground in L.A. on Thursday accompanied by a tall brunette, who he was also spotted holding hands with during a grocery store run early in the day, according to Too Fab.

"She's a model and it's a new relationship," a source told E! News. "They're taking things slowly but he obviously thinks highly of her to introduce her to Bronx."

Although Wentz has yet to comment on the reported new relationship, after announcing his split with Ashlee Simpson earlier this year, things appear to be going pretty well for the rocker.

He is in a "really good place," adds the source.