Real age of Kevin Costner in American Flyers
In the movie American Flyers, Kevin Costner was:
29 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 American Flyers was released:
January 1, 1985
And the day in which Kevin Costner was born:January 18, 1955
Since movies usually don't take more than one year to be released since the beginning of the filming process, Kevin Costner may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.