Christopher Lloyd was 35 in One Flew Over the Cuckoo's Nest when he played the character 'Max Taber'.
That was over 49 years ago in 1975.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 85, and has starred in 166 movies in total, 162 of those since One Flew Over the Cuckoo's Nest was released.
In One Flew Over the Cuckoo's Nest, I think Christopher Lloyd looks: