How old was Dermot Mulroney in Flash of Genius?

There’s something captivating about discovering a celebrity’s age during a defining role. That knowledge can reshape how we view their performance. We’re about to uncover that piece of the puzzle.

In the movie Flash of Genius, Dermot Mulroney was at the age of:

44 years old

Based on our estimate, that was the actual age of the celebrity at the time.

To determine the age, we considered the first day of the year Flash of Genius premiered:

January 1, 2008

And the birth date of Dermot Mulroney:

October 31, 1963

Because movies often premiere within a year of starting production, Dermot Mulroney might have been either one year younger or older while filming some scenes.