Matt Damon

George Lonegan

Cécile de France

Marie Lelay

Bryce Dallas Howard

Melanie

Thierry Neuvic

Didier

Cyndi Mayo Davis

Island Hotel Clerk

Lisa Griffiths

Stall Owner

Jessica Griffiths

Island Girl

Ferguson Reid

Rescuer

Derek Sakakura

Rescuer

George McLaren

Markus/Jason

Frankie McLaren

Markus/Jason

Lyndsey Marshal

Jackie

Jay Mohr

Billy

Rebekah Staton

Social Worker

Declan Conlon

Social Worker

Charlie Creed-Miles

Photographer

Richard Kind

Christos

Claire Price

Marcus' Teacher

Franz Drameh

Teenager

Marcus Boyea

Teenager

Niamh Cusack

Foster Mother

George Costigan

Foster Father

Mathew Baynton

College Receptionist

Paul Antony-Barber

Nigel

Selina Cadell

Mrs. Joyce

Derek Jacobi

Derek Jacobi

Tim Fitzhigham

Bearded Author

Marthe Keller

Dr. Rousseau

Céline Sallette

Secretary

Mylène Jampanoï

Reporter Jasmine

Stéphane Freiss

Guillaume Belcher

Laurent Bateau

TV Producer

Calum Grant

Factory Worker

Steve Schirripa

Cooking Teacher 'Carlo'

Joe Bellan

Tony

Jenifer Lewis

Candace

Tom Beard

Priest

Andy Gathergood

Jackie's Friend

Helen Elizabeth

Jackie's Friend

Jean-Yves Berteloot

Publishing Executive Michael

Surinder Duhra

Islamic Teacher

Sean Buckley

Dr. Meredith

Audrey Brisson-Jutras

Hospice Receptionist

Jess Murphy

Dying Woman

Cabran E. Chamberlain

Union Rep (uncredited)