Real age of Morgan Lily in X-Men: First Class
In the movie X-Men: First Class, Morgan Lily was:
10 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 X-Men: First Class was released:
January 1, 2011
And the day in which Morgan Lily was born:April 11, 2000
Since movies usually don't take more than one year to be released since the beginning of the filming process, Morgan Lily may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.