Sam Witwicky

Shia LaBeouf

Mikaela Barnes

Megan Fox

Optimus Prime (voice)

Peter Cullen

Capt. Lennox

Josh Duhamel

Epps

Tyrese Gibson

Megatron (voice)

Hugo Weaving

Simmons/Voice of Jetfire

John Turturro

Fallen (voice)

Tony Todd

Ron Witwicky

Kevin Dunn

Leo Spitz(as Ramon Rodriguez)

Ramón Rodríguez

Judy Witwicky

Julie White

Galloway

John Benjamin Hickey

Alice

Isabel Lucas

Special Air Service Forces

Matthew Marsden

Special Air Service Forces

Andrew Howard

Bumblebee

Mark Ryan

Cal

Michael Papajohn

General Morshower

Glenn Morshower

Ratchet

Robert Foxworth

Jolt

Anthony Anderson

Aide

John Eric Bentley

Arcee Rider

Erin Naas

Professor Colan

Rainn Wilson

April the Resident Assistant

Katie Lowes

Fassbinder

Jonathon Trent

Sharsky(as Howard Walker)

Walker Howard

Frisbee Girl

America Olivo

Frat Guy

Aaron Hill

Frat Guy

Jareb Dauplaise

Pundit

John Sanderford

Pundit

Christopher Curry

Egyptian Interpol Officer #1

Cas Anvar

Egyptian Interpol Officer #2

Michael Benyaer

Mudflap (voice)

Reno Wilson

Ironhide (voice)

Jess Harnell

Egyptian Guard

Deep Roy

Bedouin with Donkey

Ruben Martinez

Air Force Chief of Staff

Spencer Garrett

Sideswipe

Andre Sogliuzzo

NORAD General

Ralph Meyering Jr.

Air Force Military Police

Aaron Norvell

NSA Officer

Eric Pierpoint

Starscream

Charles Adler

Soundwave / Devastator / Reedman (voice)

Frank Welker

Simmons Mom

Annie Korzen

Yakov

Sean T. Krishnan

Smithsonian Guard

David Bowe

Smithsonian Guard

Kamal Jones

Reporter

Aaron Lustig

Reporter

Jim Holmes

Reporter

Kristen Welker

FBI Director

Cornell Womack

Ticket Agent

David Luengas

Joint Ops Staff

Derek Alvarado

Joint Ops Staff

Alex Fernandez

Joint Ops Staff

Casey Nelson

Joint Ops Staff

Jason Roehm

USS Roosevelt Captain

John Nielsen

Diego Garcia Soldier

Rick Cramer

Diego Garcia Soldier

Arnold Chun

Diego Garcia Soldier

Marvin Jordan

Commander, US Central Command

Marc Evan Jackson

Strike Force Team

Jayson Floyd

Strike Force Team

Aaron Garrido

Strike Force Team

Josh Kelly

Strike Force Team

Joel Lambert

Strike Force Team

David Paul Olsen

Strike Force Team

Geoff Reeves

Strike Force Team

Brian Shehan

Arcee (voice)

Grey DeLisle

Wheelie / Skids (voice)

Tom Kenny

Wheelbot (voice)

Calvin Wimmer

Doctor (voice)

John Di Crosta

Prime #1 (voice)

Michael York

Prime #2 / Skipjack (voice)

Kevin Michael Richardson

Prime #3 (voice)

Robin Atkin Downes

Astronomy Student (uncredited)

Jenn An

College Student (uncredited)

Alexandra Begg

CNN Reporter (uncredited)

Caitlin Dulany

Mandarin Blogger (uncredited)

Andrew Hwang

C-17 Pilot (uncredited)

Matt Iseman

French Cafe Patron (uncredited)

Shayna Ryan

Reporter (uncredited)

Karina Michel

Mojo (uncredited)

Chester the Chihuahua