Real age of Julia Stiles in The Devil's Own
In the movie The Devil's Own, Julia Stiles was:
15 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 Devil's Own was released:
January 1, 1997
And the day in which Julia Stiles was born:March 28, 1981
Since movies usually don't take more than one year to be released since the beginning of the filming process, Julia Stiles may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.