John Ritter was 21 in The Barefoot Executive when he played the character 'Roger'.
That was over 53 years ago in 1971.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
In 2003 he died aged just 55, starring in 88 films in his career, 88 of those after The Barefoot Executive was first released. If he were alive today he would be 75.
In The Barefoot Executive, I think John Ritter looks: