Real age of Anna Paquin in X-Men
In the movie X-Men, Anna Paquin was:
17 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 X-Men was released:
January 1, 2000
And the day in which Anna Paquin was born:July 24, 1982
Since movies usually don't take more than one year to be released since the beginning of the filming process, Anna Paquin may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.