Real age of James McAvoy in Arthur Christmas
In the movie Arthur Christmas, James McAvoy was:
31 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 Arthur Christmas was released:
January 1, 2011
And the day in which James McAvoy was born:April 21, 1979
Since movies usually don't take more than one year to be released since the beginning of the filming process, James McAvoy may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.