Real age of Martha Plimpton in A Life in the Day
In the movie A Life in the Day, Martha Plimpton was:
15 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 A Life in the Day was released:
January 1, 1986
And the day in which Martha Plimpton was born:November 16, 1970
Since movies usually don't take more than one year to be released since the beginning of the filming process, Martha Plimpton may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.