London Holmes (born March 27, 1991), better known by his stage name London on da Track, is an American record producer, songwriter and former rapper from Atlanta, Georgia. He is a frequent collaborator of fellow Atlanta rapper Young Thug and has also worked with Birdman, Lil Wayne, Rich Homie Quan, Gucci Mane, Drake, T.I., Travis Porter, Rich Kidz and 50 Cent.