Gugu Mbatha-Raw

as Tess Caldwell / Sophie Ellis

Oliver Jackson-Cohen

as James Ellis

Millie Brady

as Eliza Huntley

Phil Dunster

as Quinn Huntley

Gavin Drea

as Callum Walsh

Freida Pinto

as Grace Daaveed

Rupert Graves

as Henry Huntley

Joely Richardson

as Olivia Huntley