Hugh Grant as The Prime Minister

Liam Neeson as Daniel

Colin Firth as Jamie

Laura Linney as Sarah (US version)

Andrew Lincoln as Mark

Chiwetel Ejiofor as Peter

Keira Knightley as Juliet

Martine McCutcheon as Natalie

Bill Nighy as Billy Mack

Rowan Atkinson as Rufus

Olivia Olson as Joanna

Lúcia Moniz as Aurelia

Thomas Brodie-Sangster as Sam

Marcus Brigstocke as Mikey the DJ

Robert Peston as Himself

Kate Moss as Herself

Patrick Dempsey as (US version)