Ballpoint pen on bristol board.
Done with ballpoint pen because I felt that would be the best way to depict his long blond hair (which is probably one of the first things anyone notices about him). I thought for sure it would take up the entire ink of at least one pen, and was surprised at how little ink it actually used.
Although I consider myself a classic rock fan, I have never been that big of a fan of Led Zeppelin. However, a few years ago I gained a new appreciation for them after encountering a book about them in the new arrivals section at the then-local library (if memory serves, they were performing very long songs at a time when the average length of a song played on the radio was about two minutes).