Kim and Kourtney Kardashian’s WILDEST on-screen clashes

The first-born and second-born Kardashian sisters have had a fair share of heated arguments on TV.

Let's revisit the most memorable fights between Kim Kardashian and Kourtney Kardashian:

Kim said Kourtney was the “least interesting to look at”

What started as a simple discussion about scheduling the family’s annual holiday photo shoot in season 15 of Keeping Up with the Kardashians quickly turned into an ugly fight between Kim and Kourtney.

The sisters clashed over their conflicting schedules and couldn't agree on a time.

"Maybe if you had a fucking business that you were passionate about, then you would know what it takes to run a fucking business, but you don't,” Kim snapped.

Frustrated, Kourtney walked away, only for Kim to lash out further, saying,”She's the least exciting to look at, so she can be out."

Kourtney calls Kim “an evil human being”

Not long after the holiday photo fight, tensions flared again.

An emotional Kourtney rang up Khloé Kardashian’s number to vent about Kim’s comment— unaware that Kim was listening in.

“Kim saying I'm the least interesting to look at, who even speaks like that?" Kourtney sobbed.

Kim jumped in, insisting her older sister should be more accommodating since she “works less.”

To which, Kourtney fired back, “You are a very distraught, evil human being. I don't wanna see you, okay?"

Kim attempted to apologise, but Kourtney straight away rejected it.

Kim accuses Kourtney of copying her style

While Kourtney was trying out a vintage Dior mini dress for her birthday, Khloé suggested she should get Kim’s opinion.

Just a few minutes into the FaceTime call, the sisters ended up clashing again, with Kim accusing Kourtney of stealing her style.

"I don't know what you're talking about, I've never dressed like you," Kourtney shot back.

Kourtney and Kim get into a physical altercation

By season 18, things got a lot messier.

Kim criticised Kourtney's work ethic again, claiming she “doesn't care about stuff.”

Kourtney snapped back, and the heated exchange quickly escalated into slapping, scratching and punching— a shocking physical altercation that left fans stunned.

It was one of the most unforgettable moments in the show’s history, proving just how explosive the sisters’ dynamic could be.