How old was Dermot Mulroney in My Best Friend's Wedding?

The age of a celebrity during a film’s production often sparks interest among fans. That detail can add a new layer of appreciation to their performance. We’re about to uncover that piece of the puzzle.

In the movie My Best Friend's Wedding, Dermot Mulroney was at the age of:

33 years old

That was the real age of the celebrity according to our calculation.

To determine the age, we considered the first day of the year My Best Friend's Wedding premiered:

January 1, 1997

And the date of birth of Dermot Mulroney, that is:

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.