Millie Bobby Brown Michelle
Chris Pratt Keats
Anthony Mackie Herman (voice)
Colman Domingo Wolfe (voice)
Giancarlo Esposito Colonel Bradbury / The Marshall
Stanley Tucci Ethan Skate
Woody Harrelson Mr. Peanut (voice)
Brian Cox Popfly (voice)
Alan Tudyk Cosmo (voice)
Billy Bob Thornton Voice (uncredited)
Holly Hunter Madeline Vance
Hank Azaria Perplexo (voice)
Jenny Slate Penny Pal (voice)
Jason Alexander Ted / Wingman
Michael Trucco Ben Alcott
Ke Huy Quan Dr. Amherst / P.C (voice)
Necar Zadegan Farah Bedi
Marin Hinkle Ms. Sablinsky
Anthony Russo Director, Producer
Stephen McFeely Screenplay, Executive Producer
Joe Russo Skeevy Bot (voice), Director, Producer
Billy Gardell Garbage Bot (voice)
Devyn Dalton Cosmo
Andy Muschietti Executive Producer
Martin Klebba Herman / Milkman Bot
Alan Silvestri Original Music Composer
Tuc Watkins Arthur Meadows
Woody Norman Christopher
Merle Dandridge News Anchor
Terry Notary Other, Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot
Christopher Markus Executive Producer, Screenplay
Daniel Laurie Supervising Sound Editor
Will Lyman Documentary Narrator (voice)
Patti Harrison Ligotti
Bill Clinton Self (archive footage) (uncredited)
Barbara Muschietti Executive Producer
Rob Gronkowski Blitz (voice)
Rahul Kohli Miles Watlow
Adam Croasdell The Marshall / Taco Bot / Sentry Bot / Blitz
Sarah Halley Finn Casting
Dennis Gassner Production Design
Greg Cromer Dad
Mark Miscione Fight Choreographer
Laura Sanchez Acosta Digital Compositor
Rob Mars Stunts
Michael Semanick Sound Re-Recording Mixer
Dennis Sands Scoring Mixer
Nancy Pelosi Self (archive footage) (uncredited)
Katelin Chesna Hospital Doctor (uncredited)
Vince Pisani Science Professor
Julian Ashby Art Direction
Geoffrey Haley "A" Camera Operator, Executive Producer, Steadicam Operator
Jeffrey Ford Editor, Executive Producer
Mike Larocca Producer
Judianna Makovsky Costume Design
Juan Peralta Sound Re-Recording Mixer
Antoinette LaVecchia Elena Skate
Shannon Mills Supervising Sound Editor
Jan Philip Cramer Head of Animation
Niko Nedyalkov Stunts
Carlos Guity Stunts
Anna Mercedes Mendez Stunts
Susan Leslie Mrs. Scissors (voice)
Kurt Loder Kurt Loder
Noah Bain Garret Stunts
Nicolas Bosc Stunts
Jess Durham Stunts
Michelle Rose Stunts
Aaron Becker Title Designer
Stephen F. Windon Director of Photography
Lia Mariella Russo Cheerleader
Ann Russo Mom