Jim Carrey

Peter Appleton

Martin Landau

Harry Trimble

Laurie Holden

Adele Stanton

Gerry Black

Emmett Smith

David Ogden Stiers

Doc Stanton

Bob Balaban

Elvin Glyde

Jeffrey DeMunn

Mayor Ernie Cole

Hal Holbrook

Congressman Doyle

Brent Briscoe

Sheriff Cecil Coleman

Ron Rifkin

Kevin Bannerman

James Whitmore

Stan Keller

Susan Willis

Irene Terwilliger

Catherine Dent

Mabel

Brian Howe

Carl Leffert

Karl Bury

Bob Leffert

Chelcie Ross

Avery Wyatt

Amanda Detmer

Sandra Sinclair

Allen Garfield

Leo Kubelsky

Daniel von Bargen

Federal Agent Ellerby

Mario Roccuzzo

Jerry the Bartender

Earl Boen

Newsreel Announcer (voice)

Bruce Campbell

Roland the Intrepid Explorer

Cliff Curtis

The Evil But Handsome Prince Khalid

Garry Marshall

Studio Executive (voice)

Paul Mazursky

Studio Executive (voice)

Sydney Pollack

Studio Executive (voice)

Carl Reiner

Studio Executive (voice)

Rob Reiner

Studio Executive (voice)

Matt Damon

Luke Trimble (voice)

Shawn Doyle

Federal Agent Saunders

Frank Collison

Subpoena Server

Ginger Williams

Louise

Ken Magee

Coastal Engineer

April Ortiz

Vera

Scotty Leavenworth

Joey

Steven Lee Allen

Studio Guard (uncredited)

Herbert J. Biberman

Self (Hollywood Ten, arrives) (archive footage) (uncredited)

Jennifer Blaire

Carl's Date (uncredited)

Gordon Hart

Swing Dancer (uncredited)

J. Edgar Hoover

Self (archive footage) (uncredited)

Ring Lardner, Jr.

Self (Hollywood Ten, arrives, behind Biberman) (archive footage) (uncredited)

John Howard Lawson

Self (Hollywood Ten, testifies) (archive footage) (uncredited)

Brian Libby

Studio Guard Hal (uncredited)

Amanda Melby

Young Mrs. Trimble (uncredited)

Bubba Dean Rambo

Swing Dancer (uncredited)

George Ratliff

Dancer (uncredited)

Craig Richards

Studio Guard (uncredited)

Dave Rosenbaum

Swing Dancer (uncredited)