Real age of Mamie Gummer in Twelve Thirty
In the movie Twelve Thirty, Mamie Gummer was:
26 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 Twelve Thirty was released:
January 1, 2010
And the day in which Mamie Gummer was born:August 03, 1983
Since movies usually don't take more than one year to be released since the beginning of the filming process, Mamie Gummer may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.