Stephen Merchant is a British writer, director, radio presenter, stand-up comedian, and actor, best known for his work on The Office, Extras, and The Ricky Gervais Show.
Perfect casting for the Harry Potter films, actors from the original movies are permitted (dead and/or alive) alongside new ones. You may cast adults in the roles of child parts, with the intention of them in the role at a younger age, same with any other actor if you so choose. (Ex: You pick Alan Rickman, but you do so with the intention of him in his 40s)
