casting - Where is Gemma Arterton in The Wrath of the Titans?

I know her character from Clash of the Titans was replaced by Rosamund Pike in 'Wrath' - are you confusing the two films?

According to Gemma's IMDb page, she is not in Wrath of the Titans

I haven't seen the newest film, so I cannot verify this though.

UPDATE (with SPOILER)

According to a review on the MovieBlog:

Gemma Arterton’s character Io, is no longer present as we learn she finally has died, a gift in some ways as Zeus granted her mortality. However her death did not come without a sense of happiness, as she bore Perseus’ son, Helios (John Bell), whom he now raises alone.

Every other site I visited claimed she was not in the film - so now I am doubly confused ;)