Watch House Party Full Movie Free Online 123Movies. Aspiring club promoters and best buds Damon and Kevin are barely keeping things together. Out of money, down on their luck and about to lose the roofs over their heads—and freshly fired from their low-lift jobs as house cleaners—the pair needs a huge windfall to make their problems go away. In a ‘what the hell?’ move, they decide to host the party of the year at an exclusive mansion, the site of their last cleaning job, which just happens to belong to none other than LeBron James. No permission? No problem. What could go wrong?