Stewart Robert Einstein (November 20, 1942 – January 2, 2019) was an American actor, comedy writer, and producer. He created and performed the satirical stuntman character Super Dave Osborne, and was also known for his roles as Marty Funkhouser in Curb Your Enthusiasm, and Larry Middleman on Arrested Development. Einstein was the son of radio comedian Harry Einstein, and the older brother of fellow actor and comedian Albert Brooks.