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Don't mess with the Kardashian family!

Keeping Up With the Kardashians returns for season 12 later this year and the E! family is a "united force" in this new promo.

"There's a lot of people telling me what to do," Kendall Jenner reveals in the video. "And I can't let that get in the way of me and my family."

"The power of family really means everything," Kim Kardashian says.

The Kardashian sisters are so close, they even consider each other their "best friends."

"We are sisters by blood but best friends by choice," Khloe Kardashian explains. "I don't know how I would live my life without my family. It's the best support system in the world."

The Kardashians have been through a lot in the past couple of months, and they're leaning on each other to get through the hard times.

"I love how we'll do anything for each other," Kim says.

Check out the KUWTK season 12 promo above to find out what else the Kardashians had to say about each other! Plus don't miss the season 12 premiere of the hit E! show later this year!

Watch a brand-new Keeping Up With the Kardashians Sunday at 9 p.m., only on E!