Among the movies of 2017, there have certainly been more objectively fun ones than Darkest Hour, director Joe Wright's Winston Churchill bio-pic that follows the British icon through his first weeks as prime minister, ending with his order for the historic World War II evacuation memorialized in Christopher Nolan's Dunkirk. But I'm not sure that any film this year has found anyone having as much fun as Gary Oldman clearly is in his role as Churchill – and blessedly, it's a performance joy equal to the considerable joy we feel while watching him.