Jon Favreau is quickly filling key roles for Disney's The Jungle Book.

Deadline reports Christopher Walken and Giancarlo Esposito will lend their voices to the film, which features only one live-action role, that of Mowgli, played by newcomer Neel Sethi.

Walken will play King Louie, king of the simians, while Esposito will lead the wolf pack as Akela. Esposito may be best known for his role as Gus on Breaking Bad, but he also played the Magic Mirror and the Genie on Once Upon a Time and also starred on Revolution.

They join a cast that includes Idris Elba, Scarlett Johansson, Lupita Nyong’o and Ben Kingsley. The Jungle Book opens Oct. 9, 2015.