Leviathan

Peter Weller

Steven Beck

Richard Crenna

Dr. Glen 'Doc' Thompson

Amanda Pays

Elizabeth 'Willie' Williams

Daniel Stern

Buzz 'Sixpack' Parrish

Ernie Hudson

Justin Jones

Michael Carmine

Tony 'DeJesus' Rodero

Lisa Eilbacher

Bridget Bowman

Héctor Elizondo

C.P. Cobb

Meg Foster

Ms. Martin

Eugene Lipinski

Russian Ship Captain

Larry Dolgin

Helicopter Pilot

Pascal Druant

Winch Operator

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Steve Pelot

Winch Operator

Tom Woodruff Jr.

Lead Creature (uncredited)