Real age of Helen McCrory in Harry Potter and the Half-Blood Prince
In the movie Harry Potter and the Half-Blood Prince, Helen McCrory was:
40 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 Half-Blood Prince was released:
January 1, 2009
And the day in which Helen McCrory was born:August 17, 1968
Since movies usually don't take more than one year to be released since the beginning of the filming process, Helen McCrory may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.