Joseph Gordon-Levitt was 5 in Stranger on My Land when he played the character 'Rounder'.
That was over 36 years ago in 1988.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 43, and has starred in 75 movies in total, 68 of those since Stranger on My Land was released.
In Stranger on My Land, I think Joseph Gordon-Levitt looks: