Denver Pyle was 26 in Where the North Begins when he played the character 'Jim Rockwell'.
That was over 77 years ago in 1947.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 1997 he died aged 77, starring in 100 films in his career, 98 of those after Where the North Begins was first released. If he were alive today he would be 104.
In Where the North Begins, I think Denver Pyle looks: