Real age of Sigourney Weaver in Alien³
In the movie Alien³, Sigourney Weaver was:
42 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 Alien³ was released:
January 1, 1992
And the day in which Sigourney Weaver was born:October 08, 1949
Since movies usually don't take more than one year to be released since the beginning of the filming process, Sigourney Weaver may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.