Syd McGee Sam Greenfield (voice) Jenni Baird Bob (voice) Kim Sønderholm Dragon (voice) Rowan Atkinson Captain (voice) Nelcie Souffrant Jeff the Unicorn (voice) Jeff Meacham Marvin (voice) Jay Leno Jerry (voice) Muhammad Ali Rootie (voice) Colin O'Donoghue Hazel (voice) Ian James Corlett Mrs. Rivera / Saorise / Penny Depot Boss (voice) John Ratzenberger Social Worker (voice) Pamela Adlon Hazel's Mom / Aine (voice) Adelynn Spoon Gael (voice) Shunji Tagawa Typing Bunny (voice) Marie Waade Grønning Phil the Pig Foreman (voice) Kwaku Fortune Hazel's Dad / Nosy Cat (voice) Gillian Vigman Quinn / Fred (voice)