Sienna Miller has been on both sides of the love triangle, playing the victim in 2005 when her then-fiance, Jude Law, had a fling with his kids' nanny. This wasn't exactly a funny Fran Drescher-nanny affair, so ultimately the couple called it quits. Jude took a sad song and made it better in 2009, and the couple gave it a second go. But they split again when Sienna cheated with pal Daniel Craig. Now that revenge is sweet.