The American actor and comedian Robin Williams (1951–2014) starred in films, television and video games throughout a career that spanned nearly four decades. Known for his fast-paced, improvisational style and for playing a wide variety of characters, he was described by Screen Actors Guild president Ken Howard as "a performer of limitless versatility, equally adept at comedy and drama, whether scripted or improv". He is often regarded as one of the greatest comedians of all time.