Stuart Pankin

Earl Sinclair (voice)

Jessica Walter

Fran Sinclair (voice)

Jason Willinger

Robbie Sinclair (voice)

Sally Struthers

Charlene Sinclair (voice)

Kevin Clash

Baby Sinclair (voice)

Brian Henson

Arthur Rizzic (voice)

Tim Doyle

General Chow (voice)

Kirk R. Thatcher

Wereman (voice)

Steve Landesberg

Gary (voice)

Julia Louis-Dreyfus

Heather Worthington (voice)

Ken Hudson Campbell

Crazy Lou (voice)

Jeffrey Tambor

Hank Hibler (voice)

Dan Castellaneta

Zabar (voice)

Michelan Sisti

Additional Dinosaur Performer / Cavepeople

Stephen Caffrey

Scabby (voice)

Harold Gould

Dinosaur Chief (voice)

Robert Picardo

Muse (voice)

Sally Kellerman

Pteranodon (voice)

Harry Shearer

Narrator (voice)

Perry Anzilotti

Chang Chang

Jeff Chayette

Ling Ling

Julie Maddalena

Caveman's Wife

Peter Bonerz

Insurance Agent (voice)

Steven Banks

Folk Singer (voice)

Michael Earl

Boy Contestant (voice)

Paula Marshall

Cavewoman

David Wohl

Bob (voice)

Mimi Kennedy

Glenda Molehill (voice)

Jack L. Harrell

Mr. Harold Heffer (voice)

Michael Dorn

Television Announcer (voice)

David Leisure

Mr. Teddy Wolfe (voice)

Jason Alexander

Sexual Harris (voice)

Heather McPhaul

Caller (voice)

Tony Shalhoub

Jerry Valentine (voice)

John Vernon

Mr. Ashland (voice)

William Schallert

Wesayso Scientist (voice)

Edie McClurg

Shopper (voice)

Richard Portnow

Mel Luster (voice)

Buddy Hackett

Louie (voice)

George Gaynes

Elder in Chief (voice)

G.W. Bailey

Sarge (voice)

Gary Owens

Narrator (voice)

Fred Travalena

Bob Hack (voice)

Paxton Whitehead

Judge (voice)

Jason Bernard

Edward R. Hero (voice)

Shaun Baker

Lingo (voice)

Michael Richards

Director (voice)

Richard Simmons

Richard Simmons Dinosaur (voice)

Kate McGregor-Stewart

Neighbor No. 3 (voice)

Chuck Varesko

News Bulletin Announcer (voice)

Charles Kimbrough

Dr. Ficus (voice)

Wendie Jo Sperber

Wendy Richfield (voice)

Thom Sharp

Ed (voice)

Allan Trautman

Maurice (voice)

Pat Crawford Brown

Stenographer (voice)

Suzie Plakson

Thighs of Thunder (voice)

John Glover

Prosecutor (voice)

Elizabeth Collins

Leeza (voice)

Tim Curry

Chief Elder (voice)

Julianne Buescher

Simone Poupon (voice)

Sam McMurray

Andre (voice)

Steve Whitmire

Woody (voice)

Jessica Lundy

Sitcom Wife (voice)

Julius Carry

Mudbelly (voice)

Jon Polito

Ty Warner (voice)

Conchata Ferrell

Shelly (voice)

Bruce Lanoil

Judge (voice)

Christopher Meloni

Spike (voice)

Florence Stanley

Grandma Ethyl Phillips (voice)

David Warner

Spirit of the Tree (voice)

Michael McKean

Ed (voice)

Sherman Hemsley

B.P. Richfield (voice)

Joe Flaherty

Elder (voice)

Glenn Shadix

Ray (voice)

Susan Norfleet

Pearl Sinclair (voice)

Joyce Kurtz

Brigitte (voice)

Ed Asner

Evil Georgie (voice)

Ernie Anderson

Announcer (voice) (uncredited)

Eileen Dunn

Miss Honeywell