Duos/groups in media/real life, who were never friends/didn't like each other despite the looks?

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The original was posted on /r/twobestfriendsplay by /u/StormRegion on 2023-06-27 16:51:45+00:00.

The best example I can think of is Adam Savage and Jamie Hyneman in Mythbusters, they actually said that they only viewed themselves as colleagues and nothing more, they barely met with each other outside of the show, despite their on-scene chemistry

Any other examples you know of?