[This story contains major spoilers for Scream 7.] To say that Mckenna Grace is booked and busy would be an understatement.  The Texas native collects coveted roles and franchise parts like Thanos amasses Infinity Stones or Tom Hanks stockpiles vintage typewriters. Depending on your criteria, the 19-year-old actor has starred in or appeared in as many as 14 projects involving established IP. Of course, it’s a sign of the branded entertainment era that Grace grew up in, but that doesn’t change the fact that she betters whatever story she’s telling, whether it’s as the central hero of Jason Reitman’s recent Ghostbusters movies or a supporting role in Kevin Williamson’s Scream 7. (The latter just achieved a franchise-best opening weekend of $64 million domestic and $97 million worldwide.) Oddly enough, Grace did not know which role she was playing in the seventh installment of the Scream franchise until shortly before filming started. She originally auditioned for another character — one can surmise it was Tatum Evans, Sidney Evans’ (née Prescott) daughter — but being such a fan of …