And actually, to be fair, this wasn't even the first movie that they starred in together. That would have been The Chase, made the year before. (That one also starred Marlon Brando, so Barefoot in the Park is their first film they didn't have to share star billing with anyone.)
I wonder what the "record" is for the longest period between two people starring in their first movie together and their latest? 51 years has to be close, if not "it."
Mind you, in between, they also filled in the gap to star in The Electric Horseman in 1979.
So, just one year between their first two films. But then 12 years pass before they get together again on screen. And another 38 years before they try it one more time. Hey, I guess sometimes it just takes a while looking for the right project to re-team...
I initially had embedded the trailer, but then I watched this clip, and when I came to the 1:30 mark, I knew I had to use this one instead. It's sort of remarkable, in a movie history kind of context --
And then a quick time-warp half a century ahead. This is what life is like 50 years later..