Cristin Milioti
as Hazel Green-Gogol
Ray Romano
as Herbert Green
Billy Magnussen
as Byron Gogol
Noma Dumezweni
as Dr. Fiffany Hodeck
Dan Bakkedahl
as Lyle Herringbone
Sarunas J. Jackson
as Jay
Caleb Foote
as Bennett Hobbes
Cristin Milioti
as Other Hazel
Billy Magnussen
as Other Byron
Augusto Aguilera
as Liver