Marshall Bruce Mathers III (born October 17, 1972), better known by his stage name Eminem or his alter ego Slim Shady, is an American rapper, record producer, and actor. Eminem quickly gained popularity in 1999 with his major-label debut album, The Slim Shady LP, which won a Grammy Award for Best Rap Album. The following album, The Marshall Mathers LP, became the fastest-selling solo album in United States history. It brought Eminem increased popularity, including his own record label, Shady Records, and brought his group project, D12, to mainstream recognition. As well as being a member of D12, Eminem is also one half of the hip-hop duo Bad Meets Evil (the other member being Royce da 5'9").