Real age of Michael Angarano in One Last Thing...
In the movie One Last Thing..., Michael Angarano was:
17 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 One Last Thing... was released:
January 1, 2005
And the day in which Michael Angarano was born:December 03, 1987
Since movies usually don't take more than one year to be released since the beginning of the filming process, Michael Angarano may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.