Kevin Hart, Jimmy Fallon The entertainer is promoting his giant new concert film ' Kevin Hart: What Now?' which opens in theaters Oct. Actor/comedian Kevin Hart stopped by The Tonight Show on Tuesday to discuss his upcoming concert film Kevin Hart: What Now? The host excitedly admitted to viewers that ?What we did this morning is going to be bigger than the rollercoaster," referring to the outing he and Hart embarked on the last time that went viral.