Real age of James Caan in Comes a Horseman
In the movie Comes a Horseman, James Caan was:
37 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 Comes a Horseman was released:
January 1, 1978
And the day in which James Caan was born:March 26, 1940
Since movies usually don't take more than one year to be released since the beginning of the filming process, James Caan may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.