Donald Draper wrote:
Greg was John Blake's age given in the script?
I can't remember. The movie had already started filming, and the part had already been cast, by the time I got involved, so I always pictured Joseph Gordon-Lewitt in the part, and wrote Blake accordingly.
In general, movie scripts tend not to specify the exact ages of characters unless it's important to the plot for some reason.
"They need to kill you before you turn eighteen and inherit the kingdom . . . ."