Thea Sharrock Director Sam Rockwell Ivan Voice Angelina Jolie Stella Voice, Producer Bryan Cranston Mack Actor Brooklynn Prince Ruby Voice Danny DeVito Bob Voice Helen Mirren Snickers Voice Ramón Rodríguez George Actor Ariana Greenblatt Julia Actor Chaka Khan Henrietta Actor Ron Funches Murphy Voice Phillipa Soo Thelma Voice Mike White Frankie, Passing Driver Actor, Screenwriter Allison Shearmur Producer Brigham Taylor Producer Sue Baden-Powell Executive Producer Florian Ballhaus Cinematographer Barney Pilling Film Editing Craig Armstrong Original Music Molly Hughes Production Design Alex Baily Art Director Rosie Goodwin Set Decoration Jill Taylor Costume Design Randi Hiller Casting