Real age of Billy Campbell in Checkered Flag
In the movie Checkered Flag, Billy Campbell 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 Checkered Flag was released:
January 1, 1990
And the day in which Billy Campbell was born:July 07, 1959
Since movies usually don't take more than one year to be released since the beginning of the filming process, Billy Campbell may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.