Real age of Christopher Mintz-Plasse in Year One
In the movie Year One, Christopher Mintz-Plasse was:
19 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 Year One was released:
January 1, 2009
And the day in which Christopher Mintz-Plasse was born:June 20, 1989
Since movies usually don't take more than one year to be released since the beginning of the filming process, Christopher Mintz-Plasse may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.