Real age of Scarlett Johansson in The Prestige
In the movie The Prestige, Scarlett Johansson was:
21 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 The Prestige was released:
January 1, 2006
And the day in which Scarlett Johansson was born:November 22, 1984
Since movies usually don't take more than one year to be released since the beginning of the filming process, Scarlett Johansson may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.