Mark Addy

Fred Flintstone

Stephen Baldwin

Barney Rubble

Kristen Johnston

Wilma Slaghoople

Jane Krakowski

Betty O'Shale

Joan Collins

Pearl Slaghoople

Thomas Gibson

Chip Rockefeller

Alan Cumming

The Great Gazoo / Mick Jagged

Harvey Korman

Colonel Slaghoople

Alex Meneses

Roxie

John Taylor

Keith Richrock

Tony Longo

Big Rocko

Danny Woodburn

Little Rocko

Taylor Negron

Gazaam / Gazing

Jack McGee

Bronto Crane Examiner

Jennifer Simard

Bride-To-Be

Heather Simpson

Tennis Girl

Chene Lawson

Kitty

Beverly Sanders

Photographer

John Cho

Parking Valet

Mark Kubr

Party Guest

Cheryl Holdridge

Genvieve

Buck Kartalian

Old Man at Bronto King

Irwin Keyes

Joe Rockhead

Mary Jo Smith

Gambler Woman

Kevin Grevioux

Associate Goon

Steve Schirripa

Croupier

Lucille M. Oliver

Hotel Worker

Joel Virgel

Keyboard Player

Rachel Winfree

Confessor

Ted Rooney

Confessor

Jim Doughan

Dinosaur Confessor

Jason Kravits

Choreographer

John Stephenson

Showroom Announcer

Brian Mahoney

Audience Man

Mel Blanc

Puppy Dino (voice)

Rosie O'Donnell

Octopus Masseuse (voice)

William Hanna

Special Appearance

Joseph Barbera

Special Appearance

Tracie Hendricks

Rockette

Kristen Stewart

Ring Toss Girl (uncredited)

Alisa Hensley

Woman at Pool