Mads Mikkelsen, Gemma Arterton and Alexa Davalos have been cast in Clash of the Titans, the Greek-god epic being directed by Louis Leterrier (The Incredible Hulk), according to The Hollywood Reporter.
Sam Worthington was already set to star as Perseus, who goes on a quest to save a princess and defeat Hades, the god of hell.
Mikkelsen, best known to U.S. audiences for his role as the villainous Le Chiffre in the recent Bond films, will be playing Draco, a skilled fighter and leader of the Praetorian Guard who accompanies Perseus. Davalos (The Chronicles of Riddick) is Andromeda, the captured princess, and Arterton (who will also be seen in 2010's Prince of Persia: The Sands of Time) is Io, who is instrumental in bringing the winged horse Pegasus to Perseus.
Clash of the Titans is a remake of the 1981 film of the same name, which starred Harry Hamlin as Perseus and featured an all-star cast including Laurence Olivier, Claire Bloom and Maggie Smith.
Filming begins in the U.K. at the end of April, with an eye on a 2010 release.