I couldn't find the old post so I'm starting a new one.
There was some talk about Harry Shearer of "The Simpsons" and "Spinal Tap" fame appearing on the Jack Benny Show.
I don't remember if anyone was able to point to any specific shows on which he appeared. This morning I found a radio episode which might be him.
In the episode of 02-07-54 there is a child that asks Jack for his autograph. Jack asks his name and age. He says his name is Harry and he is 10 years old. (Shearer was born in December of 1943.)
Just a bit of irony... In the show, Harry says "I wish I was a celebrity" ... and then went on to star in (what will soon be) the longest-running comedy in television history, as well as many movies.