Bruce Willis
John McClane

Timothy Olyphant
Thomas Gabriel

Justin Long
Matt Farrell

Cliff Curtis
Deputy Director Miguel Bowman

Mary Elizabeth Winstead
Lucy McClane

Jonathan Sadowski
Trey

Maggie Q
Mai Linh

Andrew Friedman
Casper

Kevin Smith
Warlock - Frederick Kaludis

Yorgo Constantine
Russo

Cyril Raffaelli
Rand

Chris Palermo
Del

Sung Kang
Agent Raj

Zeljko Ivanek
Asst. Deputy Director Molina

Christina Chang
Agent Taylor

Jake McDorman
Jim

Rosemary Knower
Mrs. Kaludis

Gerald Downey
Hoover Agent

Allen Maldonado
Goatee

Chris Ellis
Capt. Jack Scalvino

Regina McKee Redwing
Nearby Agent

Tony Colitti
Chief Hazmat Agent

Tim DeZarn
Police Sergeant

Kurt David Anderson
Miller

Matt O'Leary
Clay

Nadine Ellis
Teller

Ethan Flower
Trader

Nick Jaine
Phone Guy

Tim Russ
Agent Chuck Summer

Edward James Gage
On Duty PP Operator

Edoardo Costa
Emerson

Yancey Arias
Agent Johnson

Rick Cramer
MP Rodriguez

John Lacy
EMT

Diana Gettinger
FBI Dispatcher

Alex Richard
Don Albert (uncredited)

Bryon Weiss
Robinson (uncredited)

Elena Nikitina Bick
Newscaster (uncredited)

Michael Papajohn
Gabriel's Henchman (uncredited)

Andy Dylan
Terrorist Blown Up by Fire Extinguisher (uncredited)

Peter Epstein
Terrorist Truck Driver (uncredited)

Chad Stahelski
Terrorist (uncredited)

Matt McColm
Terrorist (uncredited)

Clay Cullen
Assassin (uncredited)

Mark Falvo
FBI Special Agent (uncredited)

Alexander Kanellakos
FBI Agent (uncredited)

Jonathan Lane
FBI Agent (uncredited)

David Haverty
Police Officer (uncredited)

Brian Smyj
Police Officer (uncredited)

Joe Bucaro III
Driver (uncredited)

Patrick Michael Strange
Protestor (uncredited)