Sienna Miller and Rhys Ifans

Most tragic split: Lovestruck Rhys (of Notting Hill fame) proposed to Sienna no less than three times before she finally said yes. The couple were planning a summer wedding...but not any more. Sienna sent the poor boy packing after he became too jealous of her rekindled friendship with her Edge of Love co-star and ex-flame, Matthew Rhys. You'd think she could have chosen boyfriends with different names, wouldn't you? 

Rhys (Ifans) has been drowning his sorrows since the split, while Sienna appeared at the premiere of her new flick The Edge of Love arm in arm with Matthew Rhys. We're almost as gutted as Rhys I over this one: just think of the cute blonde babies they would have had...