Michael Cimino was 15 in Shangri-La Suite when he played the character 'Young Teijo'.
That was over 8 years ago in 2016.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 24, and has starred in 5 movies in total, 4 of those since Shangri-La Suite was released.
In Shangri-La Suite, I think Michael Cimino looks: