It's time for a list of real (not fictional) mathematicians (and
mathematical physicists) who are featured in motion pictures. Links
are to my writeups on these films. Additional suggestions are
welcome.

Rene Descarte

Cartesius
(1974) TV biography by Roberto Rossellini. Anyone know where to
find a copy?

The late Walter Matthau plays Einstein. Lou Jacobi is Kurt
Gödel. A character search at
imdb.com retrieves over two dozen
films with Einstein as a character.
(photo)

"Mathematics is a language. It's very difficult. It's subtle. You
couldn't say those things any other way - and I can talk to dead
people with it. I talk to Copernicus every day."
(photo)

"...a musical fantasia based on the true encounter between
mathematician Andrew Wiles and Fermat's last theorem..." Other
characters include Euclid, Carl Friedrich Gauss, Pythagoras, Pierre
de Fermat , Sir Isaac Newton