Real age of Daniel Radcliffe in Harry Potter and the Half-Blood Prince
In the movie Harry Potter and the Half-Blood Prince, Daniel Radcliffe was:
19 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 Daniel Radcliffe was born:July 23, 1989
Since movies usually don't take more than one year to be released since the beginning of the filming process, Daniel Radcliffe may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.