Ed Westwick and Gemma Arterton are Cathy and Heathcliff A year ago, we were all atwitter about who could play Heathcliff in a new Wuthering Heights adaptation that was supposed to be headlined by Natalie Portman as Cathy. Well, things look a little different now, as Gemma Arterton has replaced Portman — and Gossip Girl's Ed Westwick has been cast as Heathcliff.