Dante Terrell Smith (born December 11, 1973) is an American actor and MC (Rapping) known by the stage name Mos Def. Mos Def started his hip hop (hip hop music) career in a group called Urban Thermo Dynamics, after which he appeared on albums by Da Bush Babees and De La Soul. With Talib Kweli, he formed the duo Black Star (Black Star (hip hop group)), who released the album Black Star (Black Star (album)) in 1998. He was a major force in the late 1990s underground hip hop explosion spearheaded by Rawkus Records. As a solo artist he has released the albums Black on Both Sides in 1999, The New Danger in 2004, True Magic in 2006, and The Ecstatic in 2009.

Initially recognized for his musical output, Mos Defs screen work since the early 2000s has established him as one of only a handful of rappers who have garnered critical approval for their acting work. Mos Def has also been active on several social and political issues and was particularly vocal in the wake of Hurricane Katrina in 2005.