Proof (2005): Where to Watch, Cast & Facts
An evergreen, sourced guide to Proof: streaming options, cast and core facts.

Proof (2005) — an evergreen reference for this movie: the essentials, the cast, where to watch and what to watch next. The biggest risk in life is not taking one.
Where to watch
TMDB's U.S. watch-provider data lists Amazon Video, Apple TV Store, Google Play Movies, YouTube, Fandango At Home, JustWatch TV. Availability changes by country and date, so check your streaming app before watching.
Cast
Gwyneth Paltrow as Catherine Llewellyn; Anthony Hopkins as Robert Llewellyn; Jake Gyllenhaal as Harold 'Hal' Dobbs; Hope Davis as Claire Llewellyn; Danny McCarthy as Cop; Tobiasz Daszkiewicz as Limo Driver; Gary Houston as Professor Barrow; Leigh Zimmerman as Friend at Party
About Proof
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.
More like Proof
Figures and availability come from public TMDB data and are provided as a sourced reference.
Frequently asked questions
Where can I watch Proof?
TMDB's U.S. watch-provider data lists Amazon Video, Apple TV Store, Google Play Movies, YouTube, Fandango At Home, JustWatch TV. Availability changes by country and date, so check your streaming app before watching.
Who is in the cast of Proof?
Gwyneth Paltrow as Catherine Llewellyn; Anthony Hopkins as Robert Llewellyn; Jake Gyllenhaal as Harold 'Hal' Dobbs; Hope Davis as Claire Llewellyn; Danny McCarthy as Cop; Tobiasz Daszkiewicz as Limo Driver; Gary Houston as Professor Barrow; Leigh Zimmerman as Friend at Party
Is this Proof guide official?
No. It uses TMDB data as a reference and is not endorsed or certified by TMDB.



