Regina King’s acclaimed directorial debut One Night in Miami... will premiere in theaters on Christmas Day before making its way to Amazon Prime Video on Jan. 15, 2021, the streaming service announced on Friday. That means it will be available to watch over the MLK holiday weekend, which is fitting, given the premise. Set on the night of Feb. 25, 1964, the story follows new heavyweight champ Cassius Clay (before he became Muhammad Ali), who against all odds defeated Sonny Liston and shocked the boxing world. As crowds of people swarm Miami Beach to celebrate the match, Clay (Eli …