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 (voice) Alan Tudyk Cosmo (voice) Ann Russo Mom Greg Cromer Dad Vince Pisani Science Professor Camrus Johnson Corporal Carson Kurt Loder Kurt Loder Holly Hunter Madeline Vance Will Lyman Documentary Narrator (voice) Tuc Watkins Arthur Meadows Billy Gardell Garbage Bot (voice) Merle Dandridge News Anchor Necar Zadegan Farah Bedi Lia Mariella Russo Cheerleader Marin Hinkle Ms. Sablinsky Antoinette LaVecchia Elena Skate Rahul Kohli Miles Watlow Michael Trucco Ben Alcott Joe Russo Skeevy Bot (voice) Rob Gronkowski Blitz (voice) Susan Leslie Mrs. Scissors (voice) Alan Boell Sentre Tech #1 Patti Harrison Ligotti Terry Notary Mr. Peanut / Pop Fly / Sentre Drones / Ice Cream Bot / Skeeve Bot Devyn Dalton Cosmo Martin Klebba Herman / Milkman Bot