Actress Michelle Williams is dating director PHIL MORRISON just weeks after he dumped with her fiancé Heath Ledger. Brokeback Mountain co-stars Williams and Ledger, ended their engagement in September. American magazine Star is exposure Williams is stepping out with her longtime friends, Junebug filmmaker Morrison. An insider tells the magazine, "(They) are being cautious, because they know Michelle is just coming off a serious relationship - but it's hard to take things slow when you're having so much fun." Michelle Williams should be thrilled to break an almost happy couple who have a two-year-old daughter together.