Watch Into the Woods Star James Corden & Stephen Colbert Geek Out About Sondheim, Then Sing a Christmas Tune

Into the Woods star and Tony winner James Corden stopped by the Colbert Report to talk to the fellow Sondheim alum about his latest film, “our Shakespeare” Stephen Sondheim and going back-to-back this Spring as CBS’ new late-night team. Corden refers to the Into the Woods composer as “the greatest living composer and lyricist in the world,” and Colbert reminds the Brit that “He’s our Shakespeare. He’s an American. Your Shakespeare has been dead for a long time.” After more gushing, the duo signs off with a Christmas song, complete with impromptu and impeccable harmonies. Check it out below!