Michael McKean is an American actor, comedian, and musician, best known for his roles in television and film. He gained fame for his portrayal of Lenny Kosnowski on the sitcom Laverne & Shirley and as David St. Hubbins in the cult classic film This Is Spinal Tap. In addition to acting, McKean has a successful career in music and has released several albums. He has also appeared in various television shows, including Better Call Saul, where he plays Chuck McGill, showcasing his versatility as a performer.