The Passion of Ayn Rand is a 1999 American biographical drama television film directed by Christopher Menaul and written by Howard Korder and Mary Gallagher, based on the 1986 book of the same name by Barbara Branden.

The film stars Helen Mirren as philosopher and novelist Ayn Rand, who engages in an affair with Nathaniel Branden, played by Eric Stoltz, a psychologist who is 25 years younger than she is. Branden built up an institute to spread Rand's ideas, but the two eventually had a falling-out. The film also stars Julie Delpy as Branden's wife Barbara and Peter Fonda as Rand's husband Frank O'Connor.

The Passion of Ayn Rand premiered at the Sundance Film Festival on January 27, 1999, and aired on Showtime on May 30, 1999. It received moderately positive reviews from critics.