How old was Mandy Moore in The Princess Diaries?

There’s something captivating about discovering a celebrity’s age during a defining role. Knowing that can offer insight into their career stage and personal growth. We’re about to uncover that piece of the puzzle.

While The Princess Diaries was being made, Mandy Moore was:

16 years old

That number reflects the celebrity’s real age when the movie was made.

Our method involved using the first calendar day of the release year of The Princess Diaries:

January 1, 2001

And the known birth date of Mandy Moore:

April 10, 1984

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