Anatomy of the 'Arthur Christmas' Cast

Justin Bieber co-hosted ET over the weekend from New York, giving a deeper look into the anatomy of the Arthur Christmas cast.

Starring James McAvoy, Hugh Laurie and Bill Nighy, the 3D-animated family comedy reveals the genius minds responsible for Santa's impossible annual operation.

Justin Bieber provided the song Santa Claus is Coming to Town for the film's soundtrack and it's also included on his new album Under the Mistletoe, available now. Arthur Christmas opens November 23.

Watch the clip to see our in-depth interviews with the cast.