Real age of Melanie Griffith in One on One
In the movie One on One, Melanie Griffith was:
19 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 on One was released:
January 1, 1977
And the day in which Melanie Griffith was born:August 09, 1957
Since movies usually don't take more than one year to be released since the beginning of the filming process, Melanie Griffith may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.