Proof

葛妮絲·派特洛

Catherine Llewellyn

安東尼·霍普金斯

Robert Llewellyn

傑克·葛倫霍

Harold 'Hal' Dobbs

Hope Davis

Claire Llewellyn

Danny McCarthy

Cop

Tobiasz Daszkiewicz

Limo Driver

Gary Houston

Professor Barrow

Leigh Zimmerman

Friend at Party

Colin Stinton

Theoretical Physicist

Leland Burnett

Band Vocalist

John Keefe

University Friend

Chipo Chung

University Friend