Sir Andrew Aguecheek is a fictional character in William Shakespeare's play Twelfth Night, or What You Will. One of the supporting characters, Sir Andrew is a stereotypical fool, who is goaded into unwisely duelling with Cesario and who is slowly having his money pilfered by Sir Toby Belch. He is dim-witted, vain and clownish. His role in the play not only provides comedy through his pathetic situation and his long speech, but also by his distinct, long-faced appearance and garish dress sense. The role has been a favourite for actors and has been performed by Alec Guinness, Christopher Plummer, Paul Scofield and Roger Rees.