More of the silliest and most ridiculous knock-knock jokes that will have you and your friends groaning or busting a gut with laughter: Knock, knock Who's there? Ashe Ashe who? Bless you. Knock, knock Who's there? Art. Art who? R2-D2. Knock knock. Who's there? Russell. Russell who? Russell up something to eat, I'm hungry. Knock knock. Who's there? U-2. U-2 who? U-2 can tell funny knock knock jokes. An sooooo... many more