Erik Estrada was 20 in The Cross and the Switchblade when he played the character 'Nicky Cruz'.
That was over 54 years ago in 1970.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 75, and has starred in 69 movies in total, 68 of those since The Cross and the Switchblade was released.
In The Cross and the Switchblade, I think Erik Estrada looks: