Kelsey Grammer is an American actor, comedian, producer, director, writer and singer who is best known for his role as Dr. Frasier Crane in the NBC sitcoms Cheers and Frasier. He won four Emmy Awards and two Golden Globe Awards for his portrayal of the character. Grammer has also appeared in a number of films and television shows, including The Simpsons, X-Men: The Last Stand, and Toy Story 2. Grammer is also the voice of Sideshow Bob on The Simpsons. Grammer's performance as Frasier Crane in Frasier earned him critical acclaim and numerous awards, making him one of the most successful actors in television history.