Michael John McKean (born October 17, 1947) is an American actor, comedian, screenwriter, composer, singer, and musician known for various roles in film and television such as Lenny Kosnowski in Laverne & Shirley, David St. Hubbins in This Is Spinal Tap, and Chuck McGill on Better Call Saul. McKean's breakout role was annoying neighbor Lenny Kosnowski on the sitcom Laverne & Shirley. He played David St. Wikipedia