This is truly a gorgeous drawing but I have to be honest and say that I didn't recognize him and I had to read his name in your comments to know that it was him... Maybe it's the angle of the pose? I don't know... Sorry!
Funny, he looks like a German comedy-actor here, named Christoph Maria Herbst, lol. I really had to think about him then I thought, this is not possible... great drawing, I like the eyes and hair, you're so good with details!