Nicholas Joseph Strauss-Matathia (born April 1) is an American actor and singer. He is best known for portraying Sirius Black in A Very Potter Sequel and A Very Potter Senior Year, in the latter of which he also playec Fenrir Greyback. He played The Old Snatch in Me and My Dick and Penguin, Police Chief O'Hara, Thomas Wayne, Mr. Mxyzptlk, and Captain Marvel in Holy Musical B@man!. He had a small cameo in Starship.