December 17, 2009 7:00 pm James Cameron: I Knew Sam Worthington “Was The Right Guy” To Cast “Avatar” director James Cameron discusses the risk he took by casting an unknown actor as the lead in his latest film. US & World Videos 1:14 Prince Harry photobombs Meghan Markle's selfie in Nigeria 4:41 How ‘Bachelorette' Hannah Brown knew fiancé Adam Woolard was the one 6:04 Matt Rife reveals wildest gift a fan gave him 7:23 Chrissy Teigen gets ‘sentimental' gift from John Legend every year 0:49 Northern lights put on a show during geomagnetic storm
