LL Cool J is an American rapper, actor, and author, born James Todd Smith on January 14, 1968. He is known for his influential role in the development of hip-hop music, particularly in the 1980s and 1990s. His debut album, Radio, released in 1985, featured hits like "I Need a Beat" and helped establish him as a prominent figure in the genre. In addition to his music career, LL Cool J has appeared in various films and television shows, including the popular series NCIS: Los Angeles. He has received multiple awards, including two Grammy Awards, and is recognized for his contributions to both music and entertainment.