Buster Keaton was a renowned American actor, director, producer, and writer of silent films in the early 20th century. He is widely considered one of the greatest comedians of all time and is best known for his deadpan expression and physical comedy. His most famous works include The General, Steamboat Bill Jr., and Sherlock Jr. He was nicknamed 'The Great Stone Face' due to his stoic expression. Keaton was also known as 'Buster of Comedy' for his comedic genius.