Andreas Wiseman International EditorEXCLUSIVE: Pablo Larrain’s Princess Diana movie Spencer, which is set to star Kristen Stewart as the former royal, was a hot seller for FilmNation out of the Cannes virtual market.The New York-based firm all but sold out on the project, closing deals for the UK, France, Italy and Benelux (STX Entertainment), Germany and Switzerland (DCM), Australia/NZ (Roadshow), Latin America, Spain and Portugal (Sun), South Korea (Green Narae) and Japan (Tohokushina).Buyers