Suggestions by @masterofcool

Elisabeth Shue

as Katy in Animal House (1988)

Diana Ross

as Aibileen Clark in The Help (1991)

James Spader

as Stuart Whitworth in The Help (1991)

Virginia Madsen

as Celia Rae Foote in The Help (1991)

Julianne Moore

as Hillary Walters Holbrook in The Help (1991)

Julia Roberts

as Eugenia Phelan in The Help (1991)

Jason Alexander

as John Blutarsky in Animal House (1988)

Robin Williams

as Bloo in Don Bluth's Fosters Home For Imaginary Friends (1986)

Fred Savage

as Mac in Don Bluth's Fosters Home For Imaginary Friends (1986)

Gary Busey

as Old Nick in Room (1995)

Virginia Madsen

as Diane Lightson in Valkenvania (1990)

John Candy

as Officer Dennis Valkenheiser in Valkenvania (1990)

Danny DeVito

as Judge Alvin Valkenheiser in Valkenvania (1990)

Dan Aykroyd

as Christopher Thorne in Valkenvania (1990)

John Lithgow

as Mr. Kub in Project X (1992)

John Franklin

as Dwarf Partygoer in Project X (1992)

Tom Hanks

as Ben Healy in Problem Child (1999)

Jack Lemmon

as Robert Newsome in Room (1990)

Gary Busey

as Nicholas Stanford in Room (1990)

Joseph Mazzello

as Jack Newsome in Room (1990)