The Grand Knockout Tournament (colloquially also known as It's a Royal Knockout) was a one-off charity event which was shown on British television on 19 June 1987. It followed the format of It's a Knockout, a slapstick TV gameshow which was broadcast in the UK until 1982. The event was staged on the lakeside lawn of the Alton Towers stately home-cum-theme park.

• BBC
• Prince Edward, Duke of Edinburgh
• Prince Andrew, Duke of York
• Anne, Princess Royal
• Sarah Ferguson
• Prince Richard, Duke of Gloucester
• Rowan Atkinson
• Barbara Windsor
• Paul Daniels