Any actor/actress from the 1950s I always just assumed that Ralph knew him/her. If nothing else I'd guess 'Yes' and be right more often than wrong. I remember John Travolta in the booth one day - I forget why but it might have been around 1985 that when the movie PERFECT came out which Travolta was in with Jamie Lee Curtis. So Curtis's name came up at one point leading Ralph to chime in with: 'This is a coincidence, you were in a movie with her and I used to date her mother'. I think JT was, at first, a bit shocked and then monumentally impressed, like: hmmm, I guess this guy must have been a big deal at some point', cuz I don't think he had any clue as to who Ralph was.