Olivia Colman as Leda Caruso

Jessie Buckley as Young Leda Caruso

Dakota Johnson as Nina

Ed Harris as Lyle

Paul Mescal as Will

Peter Sarsgaard as Professor Hardy

Dagmara Dominczyk as Callie

Jack Farthing as Joe

Alba Rohrwacher as Female Hiker

Oliver Jackson-Cohen as Toni

Panos Koronis as Vasili

Robyn Elwell as Bianca

Ellie Mae Blake as Martha

Alexandros Mylonas as Professor Cole

Nikos Poursanidis as Male Hiker

Athena Martin Anderson as Elena

Spyros Maragoudakis as Rough Boy 1

Konstantinos Samaa as Rough Boy 2

Emmanouela Zacharopoulou as Woman at Ticket Window

Alma Stansil as Babysitter

Daniela Babek as Female Italian Scholar

Ellie James as Older Bianca

Isabelle Della-Porta as Older Martha

Vassilis Koukalani as Maurice (uncredited)