Dylan O'Brien as B-127 / Bumblebee (voice)

Hailee Steinfeld as Charlie Watson

John Cena as Jack Burns

Jorge Lendeborg Jr. as Memo Gutierrez

John Ortiz as Dr. Powell

Stephen Schneider as Ron

Jason Ian Drucker as Otis Watson

Pamela Adlon as Sally Watson

Len Cariou as Hank

Glynn Turman as General Whalen

Peter Cullen as Optimus Prime (voice)

Angela Bassett as Shatter (voice)

Justin Theroux as Dropkick (voice)

Gracie Dzienny as Tina Lark

Ricardo Hoyos as Tripp Summers

Lenny Jacobson as Roy

Megyn Price as Amber

Kollin Holtz as Craig

Fred Dryer as Sheriff Lock

Isabelle Ellingson as Mean Girlfriend

Mika Kubo as Mean Girlfriend

Felicia Stiles as Party Goer

George Anagnostou as Party Goer

Brandon Wardle as Party Goer

Krystin Goodwin as News Reporter

Nick Pilla as Young Agent Simmons

Sachin Bhatt as Pilot Hutton

Tim Martin Gleason as Charlie's Dad

David Waters as Impatient Guy

Antonio D. Charity as Bill the Mechanic

Courtney Coker as Young Agent

Edwin Hodge as Danny Bell

Jake Huang as Danny's Paintball Team

Holland Diaz as Danny's Paintball Team

Dave Cutler as Danny's Paintball Team

Lars Slind as Humvee Driver

David Sobolov as Blitzwing (voice)

Grey DeLisle as Arcee (voice)

Jon Bailey as Shockwave / Soundwave (voice)

Steve Blum as Wheeljack (voice)

Andrew Morgado as Cliffjumper (voice)

Kirk Baily as Brawn / Seekers (voice)

Dennis Singletary as Ratchet (voice)

Vanessa Ross as The Mean Girl (uncredited)

Tony Toste as Roller Coaster Rider (uncredited)

Nico Abiera as Boardwalk Patron (uncredited)

Jiana Alvarez as Teen Party Goer / Mean Girl (uncredited)

Jace Areff as Karate Studio Friend (uncredited)

Manny Avina as Karate Student (uncredited)

William W. Barbour as Neighbor (uncredited)

Jesse Stoudt as Boardwalk Teenager (uncredited)

DeMark Thompson as Sector 7 Agent (uncredited)

Boston Rush Freeman as Otis' Dojo Friend (uncredited)

Rachel Crow as Liz

Abby Quinn as Brenda

Stephanie Heiner as Party Goer (uncredited)