Real age of Thomas Lennon in 17 Again
In the movie 17 Again, Thomas Lennon was:
38 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 17 Again was released:
January 1, 2009
And the day in which Thomas Lennon was born:August 09, 1970
Since movies usually don't take more than one year to be released since the beginning of the filming process, Thomas Lennon may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.