Real age of Jon Heder in Napoleon Dynamite
In the movie Napoleon Dynamite, Jon Heder was:
26 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 Napoleon Dynamite was released:
January 1, 2004
And the day in which Jon Heder was born:October 26, 1977
Since movies usually don't take more than one year to be released since the beginning of the filming process, Jon Heder may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.