Real age of Kiefer Sutherland in Flashback
In the movie Flashback, Kiefer Sutherland was:
23 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 Flashback was released:
January 1, 1990
And the day in which Kiefer Sutherland was born:December 21, 1966
Since movies usually don't take more than one year to be released since the beginning of the filming process, Kiefer Sutherland may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.