Suggestions by @kieranhealy

Nathan Fillion

as Guy who sings along to your the voice in Hot Rod 2

Julius Carry

as Shonuff in Hot Rod 2

Taimak

as Leeroy Green in Hot Rod 2

James Earl Jones

as Voice of Reason in Hot Rod 2

Andy Serkis

as Gollum in Hot Rod 2

Mark Hamill

as Donkey Kong in Hot Rod 2

Hugh Jackman

as Guy dancing in the background in Hot Rod 2

Emily Browning

as Girl laughing at Fight in Hot Rod 2

Jim Carrey

as Count Olaf in Hot Rod 2

Jack Black

as Guy complaining about seats in Hot Rod 2

Mike Myers

as Mike Myers in Hot Rod 2

Teagan Croft

as Amber in Hot Rod 2

Maggie Smith

as Angry Mother in Hot Rod 2

Akiva Schaffer

as Derek in Hot Rod 2

Rowan Atkinson

as Mr Bean in Hot Rod 2

Sean Bean

as Guy who dies in Hot Rod 2

James Franco

as Guy who trows a spoon at Dwayne in Hot Rod 2

Emma Stone

as Emma Stone in Hot Rod 2

Steven Spielberg

as Steven Speilberg in Hot Rod 2

Seth Rogen

as Paul (Voice) in Hot Rod 2