Question: This Is Spinal Tap co-starred which actor known for his voice work on The Simpsons?
Sentence (from "This Is Spinal Tap"): This Is Spinal Tap (stylized as This Is Spın̈al Tap) is a 1984 American rock music mockumentary comedy film directed, co-written, scored by, and starring Rob Reiner, and co-starring Christopher Guest, Michael McKean and Harry Shearer.
Relevant evidence: Yes