- Jared Leto - 2nd Lt. William Whyte
- George Clooney - Capt. Charles Bosche
- Elias Koteas - Capt. James Staros
- John C. Reilly - Sgt. Maynard Storm
- John Dee Smith - Pvt. Train
- Kirk Acevedo - Pvt. Alfredo Tella
- Mark Boone Junior - Pvt. Christopher Peale
- Matt Doran - Pvt. Howard Coombs
- Paul Gleeson - 1st Lt. George "Brass" Band
- Arie Verveen - Pfc. Charlie Dale
- Thomas Jane - Pvt. Ash
- Donal Logue - Marl (uncredited)
- John Savage - Sgt. Jack McCron
- Nick Stahl - Pfc. Edward Bead
- Miranda Otto - Marty Bell
- Tim Blake Nelson - Pvt. Brian Tills
- Larry Romano - Pvt. Frank Mazzi
- Penelope Allen - Witt's Mother
- Danny Hoch - Pvt. Leonardo Carni
- Benjamin Green - Melanesian Villager
- Simon Billig - Lt. Col. Billig
- Jarrod Dean - Cpl. Thorne
- Travis Fine - Pvt. Weld
- David Harrod - Cpl. Queen
- Don Harvey - Sgt. Becker
- Michael McGrady - Pvt. Floyd
- Stephen Spacek - Cpl. Jenks
- Steven Vidler - 2nd Lt. Gore
- Will Wallace - Pvt. Hoke
- Todd Wallace - Pilot
- Simon Westaway - First Scout
- Dan Wyllie - Medic #1
- Randall Craig - Navy Gunner (uncredited)
- Kick Gurry - (uncredited)
- Randall Duk Kim - Nisei Interpreter (uncredited)
- Darrin Klimek - (uncredited)
- Dane Moreton - Pvt. Alexander (uncredited)
- Ray Samuelson - Navy Soldier (uncredited)
- Justin Ward - Navy Soldier (uncredited)
- Felix Williamson - Private Drake (uncredited)
- Norman Patrick Brown - Pvt. Henry
- Sam Arnold - Sgt Mitchell (uncredited)
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Terrence Malick
- James Jones
- Terrence Malick
- George Stevens Jr.
- Arvo Pärt
- Andy Nelson
- Hans Zimmer
- Hugh Waddell
- Patrick J. Foley
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