Simon Pegg

as Neil Clarke

Born 02/14/1970, age

Kate Beckinsale

as Catherine

Born 07/26/1973, age

Rob Riggle

as Grant

Born 04/21/1970, age

Sanjeev Bhaskar

as Ray

Born 10/31/1963, age

Joanna Lumley

as Fenella

Born 05/01/1946, age

Eddie Izzard

as Headmaster

Born 02/07/1962, age

Meera Syal

as Fiona

Born 06/27/1961, age

Robin Williams

as Dennis the Dog (voice)

Born 07/21/1951

Died 08/11/2014, age

John Cleese

as Chief Alien (voice)

Born 10/27/1939, age

Terry Gilliam

as Nasty Alien (voice)

Born 11/22/1940, age

Eric Idle

as Salubrious Gat (voice)

Born 03/29/1943, age

Terry Jones

as Scientist Alien (voice) / Van Driver

Born 02/01/1942

Died 01/21/2020, age

Michael Palin

as Kindly Alien (voice)

Born 05/05/1943, age