Zach Galifianakis Ron (voice) Jack Dylan Grazer Barney (voice) Ed Helms Graham (voice) Olivia Colman Donka (voice) Justice Smith Marc (voice) Rob Delaney Andrew (voice) Kylie Cantrall Savannah (voice) Ricardo Hurtado Rich (voice) Marcus Scribner Alex (voice) Thomas Barbusca Jayden (voice) Ruby Wax Ms. Hartley (voice) Ava Morse Ava (voice) John Macmillan Bubble Techs (voice) Megan Maczko Miss Thomas (voice) David Menkin Shayne The Biker / Mr. Cleaver (voice)