Ryan Daniel Montgomery, known professionally as Royce da 5'9", is an American rapper and songwriter. He is best known for his longtime association with Eminem as well as his solo career, recording primarily with producers Carlos "6 July" Broady and DJ Premier, as well as ghostwriting for the likes of Diddy and Dr. Dre. Royce is currently one half of the rap duo Bad Meets Evil with Eminem and one half of the hip hop duo PRhyme with DJ Premier. He was also one quarter of the hip hop group Slaughterhouse with Joe Budden, Joell Ortiz and Kxng Crooked. The editors of ranked him No. 31 on their list of the "Top 50 MCs of Our Time".