Vin Diesel was 15 in Breakin' in the USA: Break Dancing and Electric Boogie Taught by the Pros when he played the character 'Himself'.
That was over 40 years ago in 1984.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 56, and has starred in 64 movies in total, 57 of those since Breakin' in the USA: Break Dancing and Electric Boogie Taught by the Pros was released.
In Breakin' in the USA: Break Dancing and Electric Boogie Taught by the Pros, I think Vin Diesel looks: