Catherine is a woman in her late twenties who is strongly devoted to her father, Robert, a brilliant and well-known mathematician whose grip on reality is beginning to slip away. As Robert descends into madness, Catherine begins to wonder if she may have inherited her father's mental illness along with his mathematical genius.
Acting
Paltrow's fragile, ferocious performance—she carries this film.
Writing
David Auburn's Pulitzer-winning dialogue crackles with wit and ache.
Director
John Madden
Gwyneth Paltrow
Catherine Llewellyn
Anthony Hopkins
Robert Llewellyn
Jake Gyllenhaal
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
John Keefe
University Friend
Chipo Chung
University Friend
C. Gerod Harris
University Friend
Roshan Seth
Professor Bhandari
Anne Wittman
Friend at Party
Trivia, insights & behind the scenes
Gwyneth Paltrow originated the role of Catherine on London's West End before filming, making this a rare screen adaptation starring the stage originator.
The film subtly mirrors the play's theatrical structure—most scenes are intimate two-handers, keeping the audience as uncertain as Hal about what to believe.
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