The Talented Mr. Ripley

Matt Damon, Jude Law and Gwyneth Paltrow in The Talented Mr. Ripley (1999). 

A film about identity, obsession, betrayal and ultimately getting away with murder. But for how long? It's a shame they didn't make any sequels as Damon is unrecognisable in this. He plays an odd, unsettling character, and is somehow still charismatic (so is Law as always) but you still can't help routing for him. I saw it when I was quite young and appreciate it even more now, it has a great Phillip Seymour Hoffman performance in it.