Well, if it ain't broke, just keep reusing the same actor pairings over and over again—that's how the saying goes, right?
Actually, kind of.
It's not too often that we see a pair of actors jump from movie to movie without ever releasing hands, which is why many of the duos that we've become accustomed to seeing work so well. It's also probably why we don't complain much when there's another film starring two actors who just starred in another film.
From the early 1960s to the present day, these are 21 of the most iconic duos that have graced our screens.