Dante Terrell Smith (born December 11, 1973 in Brooklyn, New York, United States), now known by the stage name Yasiin Bey (formerly Mos Def), is a Grammy Award-nominated rapper and actor. He now works under the nom de plum Yasiin Bey, and has performed under the aliases Mighty Mos Def, The Freaky Night Watchman, Boogie Man, Black Dante and Pretty Flaco. He began rapping in a group called Urban Thermo Dynamics in 1994, and then formed the duo Black Star with Talib Kweli in 1998.