AceShowbiz - Kim Kardashian and her older sister Kourtney Kardashian got into a fist fight on "Keeping Up with the Kardashians". In a sneak peek of the upcoming eighteenth season, Kim and Kourtney were seen swinging punches and wrestling each other.

Things got tense between the two sisters and it quickly escalated into a physical fight. "You've nothing to say!" Kourtney yelled at Kim before throwing stuff at her younger sister. "Don't ever come at me like that!" Kim fumed before swinging her fist.

Kim previously said she and sister Khloe Kardashian were frustrated with Kourtney because Kourtney was selfish and only wanted to film the show just when she felt like it. "If one family member goes on vacation a lot or takes time off a lot, the other family members have to step in and take over those hours," she explained to Ellen DeGeneres.

"So for the past year, Khloe and I have been taking over her hours and working because we need content to make the show. So Khloe and I have been really frustrated that we've been working longer and we have kids and a lot of stuff going on, so it's been exhausting for us when she hasn't taken that into consideration without making a decision of what she wants to do: stay on the show or not."

The new season will premiere March 29. Kourtney is expected to have less screen time as she said she was stepping back from the reality show to focus on raising her three young children with Scott Disick. "I just decided to spend more time as a mom and put more of my energy there," she claimed. "But I'm not saying goodbye."

Rumor has it, the "KUWTK" ratings dropped to a new low. When season 17 kicked off, it reportedly could attract only over one million viewers. "The glory days of the show are totally over. Now just 862,000 viewers are watching which isn't good! There is fear within E! that the numbers will drop even further," a source told Radar Online.