Millie Bobby Brown Michelle Chris Pratt Keats Ke Huy Quan Dr. Amherst / P.C (voice) Jason Alexander Ted / Wingman Woody Norman Christopher Giancarlo Esposito Colonel Bradbury / The Marshall Stanley Tucci Ethan Skate Woody Harrelson Mr. Peanut (voice) Anthony Mackie Herman (voice) Brian Cox Popfly (voice) Jenny Slate Penny Pal (voice) Hank Azaria Perplexo (voice) Colman Domingo Wolfe Alan Tudyk Cosmo / Christopher (voice) Ann Russo Mom Greg Cromer Dad Vince Pisani Science Professor Camrus Johnson Corporal Carson Holly Hunter Madeline Vance Will Lyman Documentary Narrator Tuc Watkins Arthur Meadows Billy Gardell Garbage Bot (voice) Merle Dandridge News Anchor Necar Zadegan Farah Bedi Marin Hinkle Ms. Sablinsky Antoinette LaVecchia Elena Skate Rahul Kohli Miles Watlow Michael Trucco Ben Alcott Rob Gronkowski Blitz (voice) Susan Leslie Mrs. Scissors (voice) Jeffrey Ford Drone Pilot 2 Patrick Newall Bumper Car Drone Pilot Terence Lee Cosmo Capture Drone Alan Boell Sentre Tech 1 Patti Harrison Ligotti Chris Castaldi Determined Drone Pilot Terry Notary Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot Adam Croasdell The Marshall / Taco Bot / Sentry Bot / Blitz Devyn Dalton Cosmo Gabrielle Maiden Penny Pal / Mrs. Scissors / Happy Pill Bot / Sentre Drones Martin Klebba Herman / Milkman Bot Kurt Loder Kurt Loder Katelin Chesna Hospital Doctor (uncredited) Sebastian Soler Orderly (uncredited) Joe Russo (uncredited)