8 On-Screen Friends Who Despised Each Other Off-Screen (3 of 3)

Leighton Meester and Blake Lively

As Serena and Blair in “Gossip Girl,” the two girls shared plenty of drama involving boyfriends and such, but in the end they always found a way to stay best friends. But in real life, it was a whole lot more complicated. In fact, when rumors came out that the actresses weren’t cool with each other, Lively’s rep was basically like, Leighton who? In a 2017 interview with Vanity Fair, executive producer Joshua Safran also confirmed that they didn’t care much for each other, but were really good at faking it on set.

Ariana Grande and Jennette McCurdy

Grande and McCurdy launched their careers on the successful Nickelodeon shows “Victorious” and “iCarly,” respectively. So pairing them up in “Sam & Cat” seemed to be a logical move. But once Jennette got wind that Ariana was being paid a whole lot more than she was to be on the show, she boycotted the Kid’s Choice Awards. Alas, the show got canceled after only one season. The two have seemingly made amends since then, with McCurdy congratulating Grande in 2018 on her engagement to then-fiancé Pete Davidson, and Grande tweeting a response of appreciation.