Aaron Eckhart is "obsessed" with photography.

The 'Dark Knight' star - who recently shot a campaign for close friend Molly Sims' jewellery line Grayce the Collection - says his new hobby is taking over his life and he would even consider abandoning acting in order to concentrate on his passion full-time.

He said: "I'm obsessed with it - it's all I do. That's really the only thing I think about.

"Will I turn professional? I will if somebody asks me. Hopefully I'll do exhibitions and all that sort of stuff. I'm really just a photography geek. I just love to shoot."

However, despite shooting a fashion campaign, Aaron insists his photography passion lies mostly with human stories and portraits.

He explained to People magazine: "Straight-up fashion photography in the studio - that's not what I necessarily aspire to, you know? I like to be outside, on location, making up stories. That's where my acting comes in."

Aaron's most recent film work was on 'The Rum Diary' with Johnny Depp, though he is unsure why the film - based on the work of journalist Hunter S. Thompson - still has no release date.

He said recently: "I don't know where they're at. I think they're trying to get into Cannes, maybe.

"It hasn't even been a year yet, so I don't think there are any problems. It's one of those movies where, you know - this is Johnny's pet project, it's his baby. So I think he's going to take his time and release it in the proper place. I think it'll do good, I really do. Johnny's absolutely wonderful in it."