Clint Howard was 16 in The Many Adventures of Winnie the Pooh when he played the character 'Roo (Honey Tree and Blustery Day) (voice)'.
That was over 47 years ago in 1977.
Today he is 65, and has starred in 157 movies in total, 143 of those since The Many Adventures of Winnie the Pooh was released.
In The Many Adventures of Winnie the Pooh, I think Clint Howard looks: