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Mat and James prepare to perform in front of a studio audience.
Find out more about Mathew Horne and James Corden, the brains behind the faces belonging to the boys behind Horne and Corden.
Hey! Those two guys from Gavin and Stacey have returned to BBC Three with their very own sketch show. Check back here for more exclusive videos, offering a candid look behind the scenes of Horne and Corden.
Watch a short film: