William "Wee Willie" Davis (December 7, 1906 – April 9, 1981) was an American film actor and professional wrestler. He was born in New York City and died in Louisville, Kentucky, aged 74. He worked in the Jefferson County Jail in Louisville in 1972–75 as the gym guard. He was also an engineer and contributed to the invention of the Glowmeter, an early Heads up display that projected a car's speed onto the windshield. A fellow wrestler, "Prince Ilaki Ibn Ali Hassan" (real name Agisilaki Mihalakis), who also fought as the "Mad Greek", was the primary inventor.