Real age of Rose Byrne in My Mother Frank
In the movie My Mother Frank, Rose Byrne was:
20 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 My Mother Frank was released:
January 1, 2000
And the day in which Rose Byrne was born:July 24, 1979
Since movies usually don't take more than one year to be released since the beginning of the filming process, Rose Byrne may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.