Sebastian Koch was 25 in Der Liebe auf der Spur when he played the character 'Mücke'.
That was over 35 years ago in 1988.
This was his first recorded movie acting credit (although may not technically be his first actual acting role).
Today he is 61, and has starred in 68 movies in total, 67 of those since Der Liebe auf der Spur was released.
In Der Liebe auf der Spur, I think Sebastian Koch looks: