Olivia Colman

Character: Leda Caruso

Jessie Buckley

Character: Young Leda Caruso

Dakota Johnson

Character: Nina

Ed Harris

Character: Lyle

Paul Mescal

Character: Will

Peter Sarsgaard

Character: Professor Hardy

Dagmara Dominczyk

Character: Callie

Jack Farthing

Character: Joe

Alba Rohrwacher

Character: Female Hiker

Oliver Jackson-Cohen

Character: Toni

Panos Koronis

Character: Vasili

Robyn Elwell

Character: Bianca

Ellie Mae Blake

Character: Martha

Alexandros Mylonas

Character: Professor Cole

Nikos Poursanidis

Character: Male Hiker

Athena Martin Anderson

Character: Elena

Spyros Maragoudakis

Character: Rough Boy 1

Konstantinos Samaa

Character: Rough Boy 2

Emmanouela Zacharopoulou

Character: Woman at Ticket Window

Alma Stansil

Character: Babysitter

Daniela Babek

Character: Female Italian Scholar

Ellie James

Character: Older Bianca

Isabelle Della-Porta

Character: Older Martha

Vassilis Koukalani

Character: Maurice (uncredited)