Millie Bobby Brown Michelle
Woody Harrelson Mr. Peanut (voice)
Chris Pratt Keats
Billy Bob Thornton Voice (uncredited)
Giancarlo Esposito Colonel Bradbury / The Marshall
Stanley Tucci Ethan Skate
Anthony Mackie Herman (voice)
Brian Cox Popfly (voice)
Ke Huy Quan Dr. Amherst / P.C (voice)
Necar Zadegan Farah Bedi
Alan Tudyk Cosmo (voice)
Colman Domingo Wolfe (voice)
Hank Azaria Perplexo (voice)
Jenny Slate Penny Pal (voice)
Jason Alexander Ted / Wingman
Holly Hunter Madeline Vance
Michael Trucco Ben Alcott
Andy Muschietti Executive Producer
Marin Hinkle Ms. Sablinsky
Stephen McFeely Screenplay, Executive Producer
Anthony Russo Director, Producer
Joe Russo Skeevy Bot (voice), Director, Producer
Paul Sonski Set Designer
Rahul Kohli Miles Watlow
Tuc Watkins Arthur Meadows
Sarah Halley Finn Casting
Billy Gardell Garbage Bot (voice)
Patti Harrison Ligotti
Alan Silvestri Original Music Composer
Martin Klebba Herman / Milkman Bot
Christopher Markus Executive Producer, Screenplay
Bill Clinton Self (archive footage) (uncredited)
Merle Dandridge News Anchor
Terry Notary Other, Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot
Woody Norman Christopher
Katelin Chesna Hospital Doctor (uncredited)
Adam Croasdell The Marshall / Taco Bot / Sentry Bot / Blitz
Michael Semanick Sound Re-Recording Mixer
Jan Philip Cramer Head of Animation
Will Lyman Documentary Narrator (voice)
Rob Mars Stunts
Mike Larocca Producer
Angela Russo-Otstot Producer
Heiko von Drengenberg Storyboard Artist
Barbara Muschietti Executive Producer
Vince Pisani Science Professor
Mark Jan Wlodarkiewicz Music Editor
Jess Durham Stunts
Geoffrey Haley Executive Producer, "A" Camera Operator, Steadicam Operator
Greg Cromer Dad
Kurt Loder Kurt Loder
J.R. Grubbs Sound Effects Editor
Regis Harrington Stunts
John C. Hoffler Jr. Additional Second Assistant Camera
Alan Boell Sentre Tech #1
Russell Earl Visual Effects Supervisor
Edson Williams Visual Effects Supervisor
J. Mark Donaldson Stunts
Terry James Stunts
Juan Peralta Sound Re-Recording Mixer
Camrus Johnson Corporal Carson
Caitlin Dechelle Stunts
Chad S. Frey Set Designer
Susan Leslie Mrs. Scissors (voice)
Devyn Dalton Cosmo
Shannon Mills Supervising Sound Editor
Forest P. Fischer Set Designer
David Chrastka Sound Effects Editor
Jessica Merideth Stunts
Daniel F. Malone Stunts
Don Thai Theerathada Stunt Coordinator
Matt LaBorde Stunts