Real age of James Cameron in The Abyss
In the movie The Abyss, James Cameron was:
34 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 Abyss was released:
January 1, 1989
And the day in which James Cameron was born:August 16, 1954
Since movies usually don't take more than one year to be released since the beginning of the filming process, James Cameron may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.