Real age of Rupert Grint in Harry Potter and the Sorcerer's Stone
In the movie Harry Potter and the Sorcerer's Stone, Rupert Grint was:
12 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 Harry Potter and the Sorcerer's Stone was released:
January 1, 2001
And the day in which Rupert Grint was born:August 24, 1988
Since movies usually don't take more than one year to be released since the beginning of the filming process, Rupert Grint may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.