Kasseem Dean (born September 13, 1978), known professionally as Swizz Beatz, is an American record producer, rapper, DJ and entrepreneur from New York City. Born and raised in The Bronx, Dean began his musical career as a disc jockey (DJ). At the age of 16, he gained recognition in the hip hop industry through his friendship and work with East Coast rapper DMX and the Ruff Ryders Entertainment record label. Dean later found a protégé in Philadelphia-based rapper Cassidy, whose success helped the launch of his own label imprint, Full Surface Records. He went on to sign multiple artists to the label, including Eve, Mashonda, and Bone Thugs-n-Harmony. Dean also released two albums under the label; the first was a compilation, titled Swizz Beatz Presents G.H.E.T.T.O. Stories, released in 2002, and later his debut studio album, One Man Band Man in 2007. In November 2018, Dean released his second studio album, Poison, featuring collaborations with multiple hip hop artists.

Dean has produced many hit singles for a number of prominent artists across different music genres, such as hip hop, pop, soul and R&B. With a career spanning two decades, his catalog includes Ruff Ryders' Anthem and Party Up (Up in Here) (DMX), Gotta Man (Eve), Jigga My Nigga and Girl's Best Friend (Jay-Z), Upgrade U, Check on It and Ring the Alarm (Beyoncé), Good Times (Styles P), Bring 'Em Out and Swing Ya Rag (T.I.), Hotel and I'm a Hustla (Cassidy), Touch It (Busta Rhymes) and Ultralight Beam (Kanye West), among others.

Dean was named the first Producer in Residence at New York University, for the 2010–11 academic year. About.com ranked him number 27 on its list of the Top 50 Greatest Hip-Hop Producers, and The Source included him on its list of the 20 greatest producers in the magazine's 20-year history. Fellow American rapper and producer Kanye West called Dean the best rap producer of all time. Dean is also an art collector. He is a lead board member of trustees at the Brooklyn Museum since 2015, and for the companies Monster Cable and Reebok. Dean is married to American musician Alicia Keys, with whom he has two children.