Real age of Stephen King in Graveyard Shift
In the movie Graveyard Shift, Stephen King 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 Graveyard Shift was released:
January 1, 1990
And the day in which Stephen King was born:September 21, 1947
Since movies usually don't take more than one year to be released since the beginning of the filming process, Stephen King may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.