Real age of James Marsden in The 24th Day
In the movie The 24th Day, James Marsden was:
30 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 The 24th Day was released:
January 1, 2004
And the day in which James Marsden was born:September 18, 1973
Since movies usually don't take more than one year to be released since the beginning of the filming process, James Marsden may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.