Suggestions by @parzivaljoker

Jay Baruchel

as Mike Wazowski in Monsters, Inc.

Amanda Seyfried

as Eowyn in Lord of the Rings TV Series

Matthew Vaughn

as Director in Lord of the Rings TV Series

Isabelle Fuhrman

as Kim Pine in Scott Pilgrim's Precious Little Life

Colin Ford

as Young Neil in Scott Pilgrim's Precious Little Life

Troy Gentile

as Stephen Stills in Scott Pilgrim's Precious Little Life

Ezra Miller

as Wallace Wells in Scott Pilgrim's Precious Little Life

Dev Patel

as Matthew Patel in Scott Pilgrim's Precious Little Life

James Gunn

as Writer in Scott Pilgrim and the Infinite Sadness

James Franco

as Craig Toomy in The Langoliers

Christina Ricci

as Morticia Addams in The Addams Family

Jay Baruchel

as Milo James Thatch in Atlantis: The Lost Empire

Joss Whedon

as Director in The Faculty

Amy Acker

as Principal Valerie Drake in The Faculty

Katie Cassidy

as Beverly Switzler in Howard the Duck

Zach Galifianakis

as Al McWhiggin in Toy Story

Jonah Hill

as Hamm in Toy Story

Tom Kenny

as Slinky Dog in Toy Story

Anna Kendrick

as Bo Peep in Toy Story

Anne Heche

as Mrs Potato Head in Toy Story