8 Legendary Duos Who Hated Each Other's Guts

6. Abbott & Costello

Who's On First? It's the routine that, to this day, about 80% of the population has heard at least once before. But the arguments between the duo, Bud Abbott and Lou Costello, weren't always as hilariously infuriating as that skit. Most of the time, for at least one of them, it was just the regular infuriating.

Coming up on the burlesque circuit (a phrase that desperately needs to come back into frequent rotation), the two performers each had their own persona: Abbott was the cocksure straight man, Costello was the dim-witted foil. But behind the scenes, they would describe each other's personalities just a tad differently. (Abbott was "the drunk," and Costello was "the bastard.") A major rift developed between them, in no small part because their early success began to fade once a hot new comedy team, Dean Martin and Jerry Lewis, came on the scene.

But there were also a number of personal tragedies that befell them - Abbott suffered from a nasty bout with epilepsy, Costello's infant son drown in their family pool - that caused tensions between them to raise even further. And their personalities started genuinely clashing more and more over time, and not in that cute "Who's On First?" way.

They eventually stopped speaking to each other when they weren't working (which was becoming less frequent) and refused to appear on screen together in their last couple of movies, filming their scenes separately. They begrudgingly worked together until the public started to move on from them in the late '50s.