Leroy Williams Jr. (born October 13, 1972), known by his stage name Mr. Lee, is an American record producer, recording engineer, musician,and entrepreneur. He is the founder and current CEO of Xclusive Music Group and Noddfactor Productions. He has produced albums for and overseen the careers of many rappers, including Slim Thug, Paul Wall, 2pac, Bun B, Scarface (rapper), and Iggy Azalea. He is credited as a key figure in the popularization of Houston music, a style of rap music characterized as synthesizer-based with slow, heavy beats.