JacksonWard Film

I own the DVD for Wicker Park. It is by no means a great film. But its one I wanted to watch at the cinema and never got round to seeing. My girlfriend spotted it in my DVD collection last night and decided she watched to watch it with me. I consider the film to be pretty good. My girlfriend was bored with it within 30 minutes. She claimed that Josh Hartnett is an awful, wooden, creepy actor. My question is simple, Is Josh Hartnett a terrible actor in Wicker Park?
If he is, I never noticed in the past. I think the film has a great soundtrack, and the story isn’t that bad either, its got a good twist in it. What more can you want from a light hearted film about a guy who becomes infatuated with a girl whilst he is in a relationship.