Elizabeth Banks
— Carol
John C. Reilly
— Gary
Juliette Lewis
— Nurse Chapman
Sofia Boutella
— Rebecca
Kathryn Newton
— Margo Case
Lamorne Morris
Toby Larsen
— Quentin
Anna Marie Dobbins
— Robot Carol
Ilia Volok
— Nikodem
Emmie Nagata
— Companion 3
Denise Milfort
— Companion 2
Susan Gray
— Carol’s Neighbor
Diana Dorempz
— Companion 1
Ella Womack
— Aleksandra
Brad Swanick
— Ideal Man