Daniel Radcliffe: I'm Grateful To Harry Potter Books
The actor was quizzed about his favourite book by kids' book publisher Scolastic as part of the Read Every Day campaign - and plumped for Harry Potter And The Philosopher's Stone.
He said: "It would be churlish of me not to say that it was the book that gave me everything I have."
Meanwhile Louis Tomlinson from One Direction had no pretensions when asked for his favourite, choosing David Beckham's Soccer Skills.
Louis was recently injured in a charity football match.
And his 1D bandmate Harry Styles selected Michael Buble's autobiography Onstage, Offstage.