Real age of John Travolta in This Is 40
In the movie This Is 40, John Travolta was:
57 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 This Is 40 was released:
January 1, 2012
And the day in which John Travolta was born:February 18, 1954
Since movies usually don't take more than one year to be released since the beginning of the filming process, John Travolta may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.