An Invisible Sign is a 2010 American drama film directed by Marilyn Agrelo and starring Jessica Alba, Chris Messina, John Shea and J. K. Simmons.

Based on the 2001 novel An Invisible Sign of My Own by Aimee Bender, the film is about a painfully withdrawn young woman who, as a child, turned to math for comfort after her father became ill, and now as an adult, teaches the subject and must help her students through their own crises.

Mona Gray systematically withdraws from life into a world of mathematics after a mysterious mental illness leaves her father incapacitated and a shell of his former self.

Aimee Bender's 2001 novel An Invisible Sign of My Own was adapted for the screen by The Wedding Planner scribes Michael Ellis and Pamela Falk.

[5] Metacritic, which uses a weighted average, assigned the film a score of 23 out of 100, based on 7 critics, indicating "generally unfavorable" reviews.