Portraying your director’s real-life parents in a movie can be daunting, but “Belfast” stars Jamie Dornan and Caitriona Balfe say Kenneth Branagh gave them the freedom to improvise in the film based on his childhood.“As Ken said, this is the script version of his parents, and I think he didn’t want to do an exact … he very much gave them over to us,” Balfe told TheWrap’s Steve Pond in a virtual interview during the Toronto International Film Festival.