Christopher Edward Martin (born March 21, 1966), known professionally as DJ Premier (also known as Preemo), is an American record producer and DJ. He has been frequently lauded as one of hip hop's greatest producers by publications such as Vibe. He formed the hip hop duo Gang Starr alongside American rapper Guru, with whom he has released seven albums. He formed another hip hop duo, PRhyme—with American rapper Royce da 5'9"—in 2014, with whom he has released two albums.

Premier has produced each of Gang Starr's releases, as well as many of those by the Gang Starr Foundation. Alongside this, he has been credited with production work on releases for ASAP Mob, AZ, Common, Eminem, the Game, Griselda, Jeru the Damaja, J. Cole, Jay-Z, Joey Badass, Kanye West, Limp Bizkit, M.O.P., Mos Def, Nas, the Notorious B.I.G., O.C., Rakim, Royce Da 5'9, Run the Jewels, and Showbiz & A.G., among others. Despite mainly working in underground hip hop, he has produced Billboard Hot 100-charting singles including "Ain't No Other Man" (2006) by Christina Aguilera, "The Actual" (1998) by All City, "Mass Appeal" (1994) and "You Know My Steez" (1997) by Gang Starr, "MC's Act Like They Don't Know" (1995) by KRS-One, and "Nas Is Like" (1999) by Nas.

Martin founded the record label, Year Round Records in 2010. He has signed acts including New York group NYGz, New Jersey rapper Nick Javas, and Houston rapper Khalil. Tha Blaqprint by Blaq Poet, which features 13 Premier productions, was released by Year Round Records through Fat Beats Records in June 2009.