Real age of Jon Favreau in Notes from Underground
In the movie Notes from Underground, Jon Favreau was:
28 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 Notes from Underground was released:
January 1, 1995
And the day in which Jon Favreau was born:October 19, 1966
Since movies usually don't take more than one year to be released since the beginning of the filming process, Jon Favreau may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.