Arterton will play the demi-goddess Io. "My part is... the coolest part," she said. "Io's not in the original film. Perseus falls in love with her and then [CENSORED FOR TINY SPOILER]. It's a really great part."
Arterton adds that compared to the 1981 original Harry Hamlin film, this one is "much more about Perseus' mission, and how he deals with being the son of Zeus."