Shia LaBeouf

Character: Sam Witwicky

Megan Fox

Character: Mikaela Banes

Peter Cullen

Character: Optimus Prime (voice)

Hugo Weaving

Character: Megatron (voice)

Tony Todd

Character: Fallen (voice)

Josh Duhamel

Character: Major Lennox

Tyrese Gibson

Character: USAF Chief Master Sergeant Epps

John Turturro

Character: Simmons

Ramón Rodríguez

Character: Leo Spitz

Kevin Dunn

Character: Ron Witwicky

Julie White

Character: Judy Witwicky

Isabel Lucas

Character: Alice

John Benjamin Hickey

Character: Galloway

Matthew Marsden

Character: Special Air Service Forces

Andrew Howard

Character: Special Air Service Forces

Michael Papajohn

Character: Cal

Glenn Morshower

Character: General Morshower

John Eric Bentley

Character: Aide

Erin Naas

Character: Arcee Rider

Rainn Wilson

Character: Professor Colan

Katie Lowes

Character: April the Resident Assistant

Jonathon Trent

Character: Fassbinder

Walker Howard

Character: Sharsky

America Olivo

Character: Frisbee Girl

Aaron Hill

Character: Frat Guy

Jareb Dauplaise

Character: Frat Guy

John Sanderford

Character: Pundit

Christopher Curry

Character: Pundit

Cas Anvar

Character: Egyptian Interpol Officer

Michael Benyaer

Character: Egyptian Interpol Officer

Deep Roy

Character: Egyptian Guard

Ruben Martinez

Character: Bedouin with Donkey

Spencer Garrett

Character: Air Force Chief of Staff

Ralph Meyering Jr.

Character: NORAD General

Aaron Norvell

Character: Air Force Military Police

Eric Pierpoint

Character: NSA Officer

Annie Korzen

Character: Simmons Mom

Sean T. Krishnan

Character: Yakov

David Bowe

Character: Smithsonian Guard

Kamal Jones

Character: Smithsonian Guard

Aaron Lustig

Character: Reporter

Jim Holmes

Character: Reporter

Kristen Welker

Character: Reporter

Cornell Womack

Character: FBI Director

David Luengas

Character: Ticket Agent

Derek Alvarado

Character: Joint Ops Staff

Alex Fernandez

Character: Joint Ops Staff

Casey Nelson

Character: Joint Ops Staff

Jason Roehm

Character: Joint Ops Staff

John Nielsen

Character: USS Roosevelt Captain

Rick Cramer

Character: Diego Garcia Soldier

Arnold Chun

Character: Diego Garcia Soldier

Marvin Jordan

Character: Diego Garcia Soldier

Marc Evan Jackson

Character: Commander, US Central Command

Jayson Floyd

Character: Strike Force Team

Aaron Garrido

Character: Strike Force Team

Josh Kelly

Character: Strike Force Team

Joel Lambert

Character: Strike Force Team

David Paul Olsen

Character: Strike Force Team

Geoff Reeves

Character: Strike Force Team

Brian Shehan

Character: Strike Force Team

Mark Ryan

Character: Jetfire (voice)

Reno Wilson

Character: Mudflap (voice)

Jess Harnell

Character: Ironhide (voice)

Robert Foxworth

Character: Ratchet (voice)

André Sogliuzzo

Character: Sideswipe (voice)

Grey DeLisle

Character: Arcee (voice)

Charlie Adler

Character: Starscream (voice)

Frank Welker

Character: Soundwave / Devastator / Reedman (voice)

Tom Kenny

Character: Wheelie / Skids (voice)

Calvin Wimmer

Character: Wheelbot (voice)

John Di Crosta

Character: Doctor (voice)

Michael York

Character: Prime #1 (voice)

Kevin Michael Richardson

Character: Prime #2 / Skipjack (voice)

Robin Atkin Downes

Character: Prime #3 (voice)

Jenn An

Character: Astronomy Student (uncredited)

Alexandra Begg

Character: College Student (uncredited)

Caitlin Dulany

Character: CNN Reporter (uncredited)

Andrew Hwang

Character: Mandarin Blogger (uncredited)

Matt Iseman

Character: C-17 Pilot (uncredited)

Shayna Ryan

Character: French Cafe Patron (uncredited)

Karina Michel

Character: Reporter (uncredited)

Chester the Chihuahua

Character: Mojo (uncredited)