Shia LaBeouf as Sam Witwicky

Megan Fox as Mikaela Banes

Mark Ryan as Bumblebee (voice)

Peter Cullen as Optimus Prime (voice)

Hugo Weaving as Megatron (voice)

Josh Duhamel as Captain Lennox

Tyrese Gibson as USAF Tech Sergeant Epps

Charlie Adler as Starscream (voice)

Rachael Taylor as Maggie Madsen

Anthony Anderson as Glen Whitmann

Jon Voight as Defense Secretary John Keller

John Turturro as Agent Simmons

Michael O'Neill as Tom Banacheck

Kevin Dunn as Ron Witwicky

Julie White as Judy Witwicky

Amaury Nolasco as ACWO Jorge 'Fig' Figueroa

Zack Ward as First Sergeant Donnelly

Luis Echagarruga as Ranger Team

Patrick Mulderrig as Ranger Team

Brian Shehan as Ranger Team

Michael Trisler as Ranger Team

Ashkan Kashanchi as Mahfouz

Rizwan Manji as Akram

William Morgan Sheppard as Captain Witwicky

C.J. Thomason as Sailor

Bernie Mac as Bobby Bolivia

Carlos Moreno Jr. as Manny

Johnny Sanchez as Clown

John Robinson as Miles

Travis Van Winkle as Trent

Peter Jacobson as Mr. Hosney

Glenn Morshower as SOCCENT Sergeant

Frederic Doss as SOCCENT Op-Centre Tech

Charlie Bodin as SOCCENT Op-Centre Tech

Joshua Feinman as USAF Staff Sergeant

Chris Ellis as Admiral Brigham

Steven Ford as Four Star General

Michael Shamus Wiles as Two Star General

Craig Barnett as Air Force Major General

Brian Prescott as Keller Aide

Scott Peat as Pentagon Watch Commander

Colleen Porch as Enlisted Aide

Brian Stepanek as Sector Seven Agent

Jamie McBride as FBI Agent

Wiley M. Pickett as FBI Agent

Andy Milder as R&D Team Leader

Brian Reece as Moustache Man

Samantha Smith as Sarah Lennox

Ravi Patel as Telephone Operator

Rick Gomez as Sheriff

Andy Dominguez as Deputy

Mike Fisher as Football Coach

Colin Fickes as Analyst

Tom Lenk as Analyst

Jamison Yang as Analyst

Esther Scott as Glen's Grandmother

Madison Mason as CNN Reporter

Jeremy Jojola as News Reporter

Jessica Kartalija as News Reporter

Andrew Altonji as Café Kid

Andrew Lewis Caldwell as Café Kid

J.P. Manoux as Witness

Pete Gardner as Dad

Sophie Bobal as Little Girl

Laurel Garner as Mom in Car

Chip Hormess as Boy in Car

Ray Toth as Pilot

Michael Adams as AWACS Controller

Ron Henry as AWACS Controller

Benjamin Hoffman as AWACS Controller

Michael McNabb as AWACS Controller

Jason White as AWACS Controller

Adam Ratajczak as Control Tower Tech

Maja Kljun as Socialite

Michelle Pierce as Socialite

Odette Annable as Socialite

Bob Stephenson as Xbox Guy

Mason Rock Bay as Mason the Mastiff Dog

Darius McCrary as Jazz (voice)

Robert Foxworth as Ratchet (voice)

Jess Harnell as Ironhide / Barricade (voice)

Jimmie Wood as Bonecrusher (voice)

Reno Wilson as Frenzy (voice)

Michael Bay as Guy Flicked by Megatron (uncredited)

Colton Haynes as Cafe Kid (uncredited)

Omar Benson Miller as Glen's Cousin (uncredited)

Robert Gerrits as Secret Service Agent (uncredited)

Chester the Chihuahua as Mojo (uncredited)

James Hunter as Cop (uncredited)