Millie Bobby Brown Michelle
Chris Pratt Keats
Anthony Mackie Herman (voice)
Woody Harrelson Mr. Peanut (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)
Brian Cox Popfly (voice)
Ke Huy Quan Dr. Amherst / P.C (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
Stephen McFeely Screenplay, Executive Producer
Billy Gardell Garbage Bot (voice)
Andy Muschietti Executive Producer
Terry Notary Other, Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot
Christopher Markus Executive Producer, Screenplay
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
Woody Norman Christopher
Michael Semanick Sound Re-Recording Mixer
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
Cameron Barker Sound Designer
Jeffrey Ford Editor, Executive Producer
Judianna Makovsky Costume Design
Juan Peralta Sound Re-Recording Mixer
Devyn Dalton Cosmo
Nancy Pelosi Self (archive footage) (uncredited)
Dennis Gassner Production Design
Noah Bain Garret Stunts
Matthew E. Butler Visual Effects Supervisor
Manish Raval Music 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
Kurt Loder Kurt Loder
Niko Nedyalkov Stunts
Katelin Chesna Hospital Doctor (uncredited)
Jacob Riehle Dialogue Editor, ADR Editor
Dennis Sands Scoring Mixer
Laura Sanchez Acosta Digital Compositor
Greg Cromer Dad
Angela Russo-Otstot Producer
Michael Li Stunt Coordinator