Tuppence Middleton
— Micky
Alexandra Roach
— Do
Kerry Fox
— Julia
Frances de la Tour
— Aunt Elinor
Emilia Fox
— Dr. Sylvie Wells
Aneurin Barnard
— Jake
Stanley Weber
— Serge
Alex Jennings
— Chance
Maisie Lloyd
— Young Do
Ciara Southwood
— Young Micky
Erich Redman
— Dr. Muller
Elizabeth Healey
— Do's Mother
Pierre Boulanger
— Jean Claude
Tim Wallers
— Do's Father
Mandi Sidhu
— Chance's Receptionist
Neelam Bakshi
— Landlady
Jemma Moore
— Micky’s Friend