Yasiin Bey, formerly known as Mos Def, is an American rapper, actor, and activist born on December 11, 1973, in Brooklyn, New York. He gained fame in the late 1990s for his unique blend of hip-hop and socially conscious lyrics. Bey is known for his thought-provoking music and has released several acclaimed albums, including Black on Both Sides. In addition to his music career, Yasiin Bey has appeared in various films and television shows, showcasing his acting talent. He is also recognized for his activism, often addressing issues such as racial inequality and social justice through his art and public appearances.