"Ugly Betty" star AMERICA FERRERA will join a voice cast that includes '300' king GERARD BUTLER and 'Superbad' boys JONAH HILL and CHRISTOPHER MINTZ-PLASSE for DreamWorks Animation's new 3-D, CGI-animated fantasy flick 'How to Train Your Dragon,' according to The Hollywood Reporter.

Based on CRESSIDA COWELL's children's book, the story follows the timid son of a Viking chief who must capture and train a dragon in order to be initiated into his tribe. Butler will play the tribe chief, Stoick the Vast, and 'Knocked Up' star JAY BARUCHEL will play the boy, Hiccup Horrendous Haddock the Third. America will voice Astrid, who helps Hiccup with the initiation.

The film is scheduled for a March 2010 release.