Richard Grieco is an American actor and former model, best known for his role as Detective Dennis Booker on the television series 21 Jump Street. He gained popularity in the late 1980s and early 1990s, appearing in various films and TV shows, including the movie If Looks Could Kill. In addition to acting, Grieco has pursued a career in music and has released several singles. He has also made guest appearances on various television programs and continues to be active in the entertainment industry, participating in conventions and fan events.