The pair recently split from their longtime loves - Hartnett from high school sweetheart ELLEN FENSTER and Jones from DJfiance Mark Ronson.
And pals now say they've since embarked on a new romance with each other, after a mutual pal arranged a date.
A source says, "They've been dating for about four weeks. It's not some great romance, at least not yet. They're just having fun."
Jones is the ex-girlfriend of SPIDER-MAN star Tobey Maguire.03/09/2004 02:59