Disney continues to compile talent for Iron Man director Jon Favreau's version of The Jungle Book, announcing today that Christopher Walken and Giancarlo Esposito have signed on for the hybrid live-action/CG film. The Many Looks of Christopher Walken Walken will lend his voice to The Jungle Book for the role of King Louie, who leads the monkeys and apes in Rudyard Kipling's classic tale.