Matthew McConaughey as Lt. Andrew Tyler

Bill Paxton as Lt. Cmdr. Mike Dahlgren

Harvey Keitel as CPO Henry Klough

Jon Bon Jovi as Lt. Pete Emmett

David Keith as Maj. Matthew Coonen

Thomas Kretschmann as Capt. Lt. Gunther Wassner

Jake Weber as Lt. Hirsch

Jack Noseworthy as Bill Wentz

Tom Guiry as Ted Trigger Fitzgerald

Will Estes as Ronald Rabbit Parker

Terrence 'T.C.' Carson as Steward Eddie Carson

Erik Palladino as Seaman Anthony Mazzola

Dave Power as Seaman Charles 'Tank' Clemens

Derk Cheetwood as Seaman Herb Griggs

Matthew Settle as Ens. Keith Larson

Rebecca Tilney as Mrs. Dahlgren

Carolyna De Laurentiis as Prudence Dahlgren

Dina De Laurentiis as Louise Dahlgren

Burnell Tucker as Adm. Duke

Rob Allyn as Ensign

Carsten Voigt as German Chief Hans

Gunter Würger as Lt. Kohn

Oliver Stokowski as German E-Chief

Arnd Klawitter as German Hydrophone Operator

Kai Maurer as German Planesman

Robert Lahoda as German Engineer

Peter Stark as German Lookout

Erich Redman as German Bosun

Robin Askwith as British Seaman