Real age of Julie Andrews in The Princess Diaries
In the movie The Princess Diaries, Julie Andrews was:
65 years old
That was the real age of the celebrity according to our calculation.
The calculation of the shown age took into account the first day of the year in which the movie The Princess Diaries was released:
January 1, 2001
And the day in which Julie Andrews was born:October 01, 1935
Since movies usually don't take more than one year to be released since the beginning of the filming process, Julie Andrews may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.