Paul McCartney will be the special guest on The Late Show with David Letterman this coming Wednesday night. Supposedly he's going to perform as well as be interviewed.

This is significant for two reasons. First, despite the fact that Dave's been on CBS since 1993, McCartney has never appeared on the show. Second, Letterman broadcasts out of the Ed Sullivan Theater, which is the same theater the Beatles played in during their famous appearance 45 years ago on The Ed Sullivan Show.

Given the significance of the event, I'm surprised McCartney hasn't appeared on the show before. I guess he had nothing to promote (this time around he's promoting some American shows he'll be performing at). Ringo Starr appeared on the show in 1995, making McCartney the last of the two surviving Beatles to put in an appearance. It would be kind of trippy and nostalgic if both of them could put in an appearance together. One can hope.