Joseph Saddler (born January 1, 1958 in Bridgetown, Barbados) better known as Grandmaster Flash, is an American hip hop musician and DJ; one of the pioneers of hip-hop DJing, cutting, and mixing. Grandmaster Flash and the Furious Five were inducted into the Rock and Roll Hall of Fame in 2007, becoming the first hip hop/rap artists to be so honored.

A true Bronxer at heart, Grandmaster Flash grew up there after his family moved to the US in the early 1960s. He is currently living in the Morrisania section of the South Bronx. He became involved in the earliest New York DJ scene, attending parties set up by early luminaries.

Grandmaster Flash's parents played an important role in his interest in music. His parents came from Barbados and his father was a big fan of Caribbean and black American records. As a child, Flash was fascinated by his father's record collection.

Grandmaster Flash has a clothing line, "G.Phyre", and has signed a deal with Doubleday who will publish his memoirs. He hosts a show on Sirius Satellite Radio & he was recently presented with the BET "I Am Hip Hop" Icon award.

It has been said that "his pioneering mixing skills transformed the turntable into a true 'instrument', and his ability to get a crowd moving has made his DJ sets legendary."