The Beatle says that he wants to do it because his daughter, Beatrice, loves the movies. Her mother also loves the idea because it will bring more money that she can attempt to get her hands on.
Paul, who claims to do a great impression of Shrek, may even land a speaking role in the film. No doubt, his Liverpudlian accent will be an asset.
McCartney has already been involved in Shrek (sort of) as his song "Live and Let Die" was used in the third installment.
