Real age of Gillian Anderson in Three at Once
In the movie Three at Once, Gillian Anderson 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 Three at Once was released:
January 1, 1986
And the day in which Gillian Anderson was born:August 09, 1968
Since movies usually don't take more than one year to be released since the beginning of the filming process, Gillian Anderson may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.