Pierfrancesco Favino
— Alexander
Kelly Reilly
— Laura
Jean Reno
— Grandpa
Ginnie Watson
— Bianca
Cara Theobold
— Jane
Deepak Verma
— Jack
Kris Marshall
— Louis
Gaia Scodellaro
— Gilda
Marie Mouté
— Marika
Freddy Drabble
— Pub waiter
Giulio Maria Corso
— Vittorio
Giulia Gabriele
— Chacha
Mary Louise Gray
— Adult Jane
Franca Abategiovanni
— Fernanda
Alice Maselli
— Sandra at 16
Natascia Perna
— Figlia di Laura
Yvonne Sciò
— Sandra's Mother
Alessandro Riceci
— Sandra's Father
William Crossley
— Louis
Douglas Dean
— Cottage Owner
Michael Fitzpatrick
— Father MacGill
Gabriele Forte
— Travelling Seller
Ethan Hunsinger
— Young Alexander 10
Marco Iannone
— Joe
Bruce McGuire
— Hugh
Francis Pardeilhan
— Theater Cashier
Nick Rea
— Mel
Marco Ar Carboni
— Alexander, Other (uncredited)
Léon Hesby
— Alexander jeune