Eclipse has found itself two more werewolves.

The third film in the Twilight Saga has cast Julia Jones (pictured) as Leah Clearwater and 15-year-old stuntman BooBoo Stewart as Leah's brother Seth.

Both these characters become full-on werewolves during Stephenie Meyer's New Moon, though they're not actually featured until Eclipse. In that installment, Leah - the pack's only female creature --and Seth team up with Jacob Black to protect Edward and Bella from an army of new vampires.

Eclipse just started shooting. It will open on June 30, 2010.