Mel Gibson
as Lt. Col. Hal Moore

Madeleine Stowe
as Julie Moore

Greg Kinnear
as Maj. Bruce 'Snake' Crandall

Sam Elliott
as Sgt. Maj. Basil Plumley

Chris Klein
as 2nd Lt. Jack Geoghegan

Keri Russell
as Barbara Geoghegan

Barry Pepper
as Joe Galloway

Duong Don
as Lt. Col. Nguyen Huu An

Ryan Hurst
as Sgt. Ernie Savage

Robert Bagnell
as 1st Lt. Charlie Hastings

Marc Blucas
as 2nd Lt. Henry Herrick

Josh Daugherty
as Sp4 Robert Ouellette

Jsu Garcia
as Capt. Tony Nadal

Jon Hamm
as Capt. Matt Dillon

Clark Gregg
as Capt. Tom Metsker

Desmond Harrington
as Sp4 Bill Beck

Blake Heron
as Sp4 Galen Bungum

Erik MacArthur
as Sp4 Russell Adams

Dylan Walsh
as Capt. Robert Edwards

Mark McCracken
as Capt. Ed 'Too Tall' Freeman

Edwin EdVanzd
as Pfc. Willie Godboldt

Brian Tee
as Pfc. Jimmy Nakayama

Sloane Momsen
as Cecile Moore

Bellamy Young
as Catherine Metsker

Simbi Khali
as Alma Givens

Jim Grimshaw
as Maj. Gen. Henry Kinnard

Forry Smith
as Sfc. Carl Palmer

Steven Nelson
as Sp5 Charlie 'Doc' Lose

Vincent Angell
as Capt. Robert 'Doc' Carrera

Michael Tomlinson
as Col. Tim Brown

Keith Szarabajka
as Diplomatic Spook

Tim Abell
as Army Intelligence Officer

Patrick St. Esprit
as General in Hallway

Mike White
as Sfc. Bob White, Mortar Sergeant

Daniel Roebuck
as Medevac CO

Maia Lien
as Army Wife

Dan Beene
as Cab Driver

Taylor Momsen
as Daughter Julie Moore

Joshua McLaurin
as Greg Moore

Devon Werkheiser
as Steve Moore

Luke Benward
as David Moore

Billinjer C. Tran
as Viet Minh Sergeant

Vien Hong
as Mr. Nik

Joseph Tran
as NVA Prisoner

Joseph Hieu
as NVA Officer

Lam Nguyen
as NVA Soldier with Bayonet

Diep Bui
as NVA Wife

Andrew Wallace
as French Bugler

Nicholas Hosking
as French Captain

Michael Giordani
as French Lieutenant

Shepard Koster
as Reporter

Kate Lombardi
as Reporter

Ingrid Semler
as Reporter

Jason Powell
as Sgt. Robert Stokes

Doug C. Cook
as Capt. Ray Lefebvre

Sean Bunch
as Trooper on Fire

F. Lee Reynolds
as Chopper Crewman

Stephen Zapotoczny
as Edwards' Radio Operator

Frank Kostenko Jr.
as Foxhole Trooper

Ben Allison
as Lt. Cochran (uncredited)

Brian Carpenter
as Sec. of Defense Robert McNamara (uncredited)

Chris Cate
as Soldier (uncredited)

George Cheung
as NVA Officer (uncredited)

Greg Craft
as Soldier (uncredited)

Donald DeNoyer
as Soldier (uncredited)

Cliff Fleming
as Capt. Jon Mills (uncredited)

Brendan Ford
as Jump Coordinator (uncredited)

Kelli Franklin
as Mrs. Charlie Hastings (uncredited)

Christian Gibson
as Soldier (uncredited)

William Gibson
as Soldier (uncredited)

Anthony Gilbert
as Soldier (uncredited)

Justin Gordon
as French Officer (uncredited)

Shannon M. Hart
as Army Wife (uncredited)

Kimby Jagnandan
as Spectator (uncredited)

Lyndon B. Johnson
as Self (archive footage) (uncredited)

Derrell Keith Lester
as Black Private (uncredited)

Will Klipstine
as Private Davey (uncredited)

Matthew Lang
as 1st Lt. John Arrington (uncredited)

Danny Le Boyer
as Sergeant (uncredited)

Blake Lena
as Soldier (uncredited)

Matt Mangum
as Pvt. Soprano (uncredited)

Johnny Nguyen
as Young NVA Lieutenant (uncredited)

Randy Oglesby
as Lt. Col. List (uncredited)

Jonathan Parks Jordan
as White Private (uncredited)

John Paul Rice
as Pvt. John Henry (uncredited)

Keni Thomas
as Sergeant (uncredited)

Phong Atwood Vo
as North Vietnamese Soldier - South Vietnamese and Villager (voice) (uncredited)