Mark Wahlberg

Cade Yeager

Laura Haddock

Viviane Wembly

Peter Cullen

Optimus Prime (voice)

Anthony Hopkins

Sir Edmund Burton

Erik Aadahl

Bumblebee (voice)

Josh Duhamel

Colonel William Lennox

Gemma Chan

Quintessa

Jim Carter

Cogman (voice)

Santiago Cabrera

Santos

Isabela Merced

Izabella

Jerrod Carmichael

Jimmy

Stanley Tucci

Merlin

Liam Garrigan

Arthur

Martin McCreadie

Lancelot

Rob Witcomb

Percival

Marcus Fraser

Gawain

John Hollingworth

Tristan

Daniel Adegboyega

Saebert

Benjamin Maurice Webb

Hengist

Glenn Morshower

General Morshower