Mark Wahlberg as Cade Yeager

Laura Haddock as Viviane Wembly

Peter Cullen as Optimus Prime (voice)

Anthony Hopkins as Sir Edmund Burton

Erik Aadahl as Bumblebee (voice)

Josh Duhamel as Colonel William Lennox

Gemma Chan as Quintessa

Jim Carter as Cogman (voice)

Santiago Cabrera as Santos

Isabela Merced as Izabella

Jerrod Carmichael as Jimmy

Stanley Tucci as Merlin

Liam Garrigan as Arthur

Martin McCreadie as Lancelot

Rob Witcomb as Percival

Marcus Fraser as Gawain

John Hollingworth as Tristan

Daniel Adegboyega as Saebert

Benjamin Maurice Webb as Hengist

Glenn Morshower as General Morshower

John Turturro as Agent Simmons

Tony Hale as JPL Engineer

Claude Knowlton as JPL Director

Jacob Zachar as Young JPL Engineer

Maggie Steed as Viviane's Grandmum

Sara Stewart as Viviane's Mum

Phoebe Nicholls as Aunt Helen

Rebecca Front as Aunt Marie

Stephen Hogan as Viviane's Father

Minti Gorne as Young Viviane

Benjamin Flores Jr. as Kid

Juliocesar Chavez as Kid

Samuel Parker as Kid

Daniel Iturriaga as Kid

Aisha Kabia as Lawyer

Andy Bean as Lawyer

Sam Yim as Lawyer

Mark Dexter as U.K. Prime Minister

Rob Jarvis as Downing Street Policeman

Tim Downie as Polo Player

Elizabeth Croft as High Society Woman

Emily Tierney as High Society Woman

Wolfgang Young as Saxon Knight

Nicholas Khan as Scientist

Leighton Sharpe as Scientist

Christina Tam as Scientist

Aiyaz Ahmed as Scientist

Pauline McLynn as Female Researcher

Matthew Castle as Student

Mia Maria as Student

Poppy Carter as Student

Seeta Indrani as News Reporter

Phill Langhorne as News Reporter

Simon Harrison as News Reporter

Wendy Albiston as Submarine Ticket Agent

John Burke as Pentagon Colonel

Barbara Eve Harris as Pentagon Colonel

Granville Ames as Pentagon Official

Jim Wisniewski as Government Suit

Mitch Pileggi as TRF Group Leader

Remi Adeleke as TRF Lieutenant

Perry Yee as TRF Operator

Brian William Price as TRF Operator

Vincent Jerome as TRF Operator

Alan Pietruszewski as F-35 Pilot

Christoper Vasquez as F-16 Pilot

Drew Waters as F-16 Pilot

Krista Schaeffer as Osprey Pilot

Walles Hamonde as American Serviceman

Tom Wright as Military Attache

Dan Warner as Military Attache

Michael Richard as Namibian Scientist

Charlie Bouguenon as Namibian Scientist

Jandre le Roux as Namibian Scientist

Frank Welker as Megatron (voice)

John Goodman as Hound (voice)

Ken Watanabe as Drift (voice)

Steve Buscemi as Daytrader (voice)

Omar Sy as Hot Rod (voice)

Reno Wilson as Mohawk / Sqweeks (voice)

John DiMaggio as Nitro Zeus / Crosshairs (voice)

Tom Kenny as Wheels (voice)

Jess Harnell as Barricade (voice)

Mark Ryan as WWI Tank / Lieutenant (voice)

Steven Barr as Nitro Zeus / Volleybot (voice)

Gil Birmingham as Chief Sherman (uncredited)

Eddie Hall as Saxon Warrior (uncredited)

Kevin Kent as TRF Group Leader (uncredited)