John Cleese was 62 in Harry Potter and the Chamber of Secrets when he played the character 'Nearly Headless Nick (Sir Nicholas)'.
That was over 21 years ago in 2002.
Today he is 84, and has starred in 161 movies in total, 74 of those since Harry Potter and the Chamber of Secrets was released.
In Harry Potter and the Chamber of Secrets, I think John Cleese looks: