Millie Bobby Brown Michelle
Chris Pratt Keats
Woody Harrelson Mr. Peanut (voice)
Anthony Mackie Herman (voice)
Stanley Tucci Ethan Skate
Holly Hunter Madeline Vance
Billy Bob Thornton Voice (uncredited)
Giancarlo Esposito Colonel Bradbury / The Marshall
Jenny Slate Penny Pal (voice)
Alan Tudyk Cosmo (voice)
Colman Domingo Wolfe (voice)
Ke Huy Quan Dr. Amherst / P.C (voice)
Brian Cox Popfly (voice)
Necar Zadegan Farah Bedi
Bill Clinton Self (archive footage) (uncredited)
Jason Alexander Ted / Wingman
Hank Azaria Perplexo (voice)
Marin Hinkle Ms. Sablinsky
Michael Trucco Ben Alcott
Anthony Russo Director, Producer
Billy Gardell Garbage Bot (voice)
Stephen McFeely Screenplay, Executive Producer
Andy Muschietti Executive Producer
Christopher Markus Executive Producer, Screenplay
Terry Notary Other, Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot
Patti Harrison Ligotti
Martin Klebba Herman / Milkman Bot
Will Lyman Documentary Narrator (voice)
Merle Dandridge News Anchor
Alan Silvestri Original Music Composer
Mike Larocca Producer
Rahul Kohli Miles Watlow
Joe Russo Skeevy Bot (voice), Director, Producer
Tuc Watkins Arthur Meadows
Michael Semanick Sound Re-Recording Mixer
Woody Norman Christopher
Adam Croasdell The Marshall / Taco Bot / Sentry Bot / Blitz
Sarah Halley Finn Casting
Barbara Muschietti Executive Producer
Vince Pisani Science Professor
Rob Gronkowski Blitz (voice)
Espen Nordahl Visual Effects Supervisor
Dennis Gassner Production Design
Cameron Barker Sound Designer
Jeffrey Ford Editor, Executive Producer
Judianna Makovsky Costume Design
Juan Peralta Sound Re-Recording Mixer
Devyn Dalton Cosmo
Manish Raval Music Supervisor
Nancy Pelosi Self (archive footage) (uncredited)
Noah Bain Garret Stunts
Matthew E. Butler Visual Effects Supervisor
Nathan Nance Sound Re-Recording Mixer
Bob E. Krattiger Gaffer
Gabrielle Maiden Penny Pal / Mrs. Scissors / Happy Pill Bot / Sentre Drones
Russell Earl Visual Effects Supervisor
Rob Mars Stunts
Daniel Laurie Supervising Sound Editor
Heikki Kossi Foley Artist
Jess Durham Stunts
Sierra Hawkins Stunt Double
Marvin Ross Stunts
Mark Miscione Fight Choreographer
Aaron Becker Title Designer
Kurt Loder Kurt Loder
Niko Nedyalkov Stunts
Katelin Chesna Hospital Doctor (uncredited)
Jacob Riehle Dialogue Editor, ADR Editor
Dennis Sands Scoring Mixer
Tom Wolfe Music Supervisor
Laura Sanchez Acosta Digital Compositor
Greg Cromer Dad