From their first day on the set of Friends, Jennifer Aniston and Courteney Cox hit it off. Unfortunately, their fiances, Justin Theroux and Johnny McDaid, can’t say the same!

WATCH: Blake Lively Reveals Amazing Details About Her Marriage to Ryan Reynolds

“Johnny thinks Justin’s an arrogant jerk, and Justin thinks Johnny’s beneath him,” claims a source. The source also says that Jennifer and Courteney have tried everything to convince their guys to become buds, but with no luck—the men just don’t get along. Rock star Johnny, 38, is a no-BS guy who thinks Justin, 42, has a too-healthy Hollywood ego.

WATCH: Khloe Kardashian Reveals Why She Doesn’t Have Sex With French Montana

The animosity goes both ways: “Johnny just irritates the hell out of Justin,” claims the source.

OK! News: Why Did Andi Dorfman Change Her Mind Last Minute About Nick and Josh?

For now, Jennifer, 45, and Courteney, 50, have given up on future double dates and shared vacations—and we can rule out a double wedding!

OK! News: The Real Reason Jennifer and Justin Aren’t Married Yet

Are you sad to hear that these guys aren’t friends? Who do you think will get married first, Jen or Courteney? Tweet us @OKMagazine.

For access to all our exclusive celebrity videos and interviews – Subscribe on YouTube!

Sound off in the comments below!

Join the conversation