Sam Neill

Dr. Alan Grant

William H. Macy

Paul Kirby

Téa Leoni

Amanda Kirby

Alessandro Nivola

Billy Brennan

Trevor Morgan

Eric Kirby

Michael Jeter

Udesky

John Diehl

Cooper

Bruce A. Young

Nash

Laura Dern

Ellie

Taylor Nichols

Mark

Mark Harelik

Ben Hildebrand

Julio Oscar Mechoso

Enrique Cardoso

Blake Michael Bryan

Charlie

Sarah Danielle Madison

Cheryl

Linda Park

Hannah

Sonia Jackson

Symposium Leader

Bruce French

Science Reporter

Bernard Zilinskas

Male Student

Rona Benson

Female Student

Frank Clem

Man in Suit

Sean Coffey

Palentology Student (uncredited)

Karin M. Gaarder

Paleontology Student (uncredited)

Edward C. Gillow

University Professor at Symposium (uncredited)

Craig Richards

Billy's Bar Buddy (uncredited)

Brad Everett Young

Paleontology Student (uncredited)