Samantha Bond as Queen Elizabeth II

David Walliams as Jack Barker

Oliver Chris as Prince Charles

Amanda Abbington as Princess Anne

Johnny Vegas as Spiggy

Lorraine Ashbourne as Violet

Julia McKenzie as The Queen Mother

Frances Barber as Princess Margaret

Emily Aston as Bev Threadgold

Emmanuel Ighodaro as Tony Threadgold

Ellen Thomas as Philomena Troussaint

Bronwyn James as WPC Ludlow

Kathryn Drysdale as Trish

Ricky Grover as Oswald

Javone Prince as Carlton

Karl Theobald as Prison Governor

Matthew Steer as Ian Livingstone-Chalk

Vincent Ebrahim as Judge

Noah Bailey as Prince Harry

Woody Melbourne as Prince William

Matt Jamie as Eccentric Pollster