Kendall and Kylie Jenner could easily feel overshadowed by their older sisters' fame. But the two youngest Jenner siblings keep up with the Kardashians just fine. At 16 and 14, respectively, Kendall and Kylie have the poise and style of seasoned fashion pros. We got a sneak peak of their joint cover of Seventeen's September issue and the scoop on family fights, their potential upcoming spin-off show and relationship rumors.

Since the Jenners made their first TV appearance in 2007, they've been on the edges of the media fanfare that surrounds their older sisters. But now, they're ready to take center stage.

According to Kendall, "We do what we want to do. We're just like, 'Let's make it happen! That sounds so fun!'"

What have the Jenners been having fun with lately? For starters, the sisters work as Seventeen's West Coast fashion contributors, for which they select their favorite trends every month. They're also co-authoring a sci-fi YA novel about a pair of sisters 200 years in the future.

Considering how much time they spend working together, a few cat fights here and there wouldn't be surprising. But the sisters couldn't be closer. "Kylie is my best friend; we have so much fun. I also like working with her because she makes me more comfortable around people and I feel like she brings out the best in me," Kendall explains.

But despite their best efforts, it isn't always easy to live a typical teen life when cameras follow your every move. Kylie set the record straight on rumors that she's dating Cody Simpson.

"Cody and I are just good friends. That's it. But we can say that as much as we want and people will still listen to gossip," she says.

For more on Kendall and Kylie, pick up the September issue of Seventeen, on newsstands August 7.

Do you love Kendall and Kylie's style? Would you watch a reality show about the sisters? Tell us in the comments below or tweet @HuffPostTeen!

Loading Slideshow...
  • Kendall Jenner; Kylie Jenner

  • Khloe Kardashian, Kylie Jenner, Kris Jenner, Kourtney Kardashian, Kim Kardashian, Kendall Jenner

    FILE - In this Aug. 17, 2011, file photo, from left, Khloe Kardashian, Kylie Jenner, Kris Jenner, Kourtney Kardashian, Kim Kardashian and Kendall Jenner arrive at the Kardashian Kollection launch party in Los Angeles. The Kardashians will visit Oprah Winfrey when ┬"Oprah┬'s Next Chapter┬" airs this Sunday, June 17 at 8 p.m. EST on OWN. (AP Photo/Matt Sayles, File)

  • Kendall Jenner, Kylie Jenner

    Kendall Jenner, left, and Kylie Jenner arrive at the world premiere of "The Hunger Games" on Monday March 12, 2012 in Los Angeles. (AP Photo/Matt Sayles)

  • Kylie Jenner, Kendall Jenner

    Television personalities and sisters Kylie Jenner, left, and Kendall Jenner arrive at the premiere of the feature film "The Vow" in Los Angeles on Monday, Feb. 6, 2012. (AP Photo/Dan Steinberg)

  • Kendall Jenner, Kylie Jenner

    Kendall, left, and Kylie Jenner arrive to the world premiere of "The Twilight Saga: Breaking Dawn - Part 1" on Monday, Nov. 14, 2011, in Los Angeles. (AP Photo/Matt Sayles)

  • 19th Annual Race To Erase MS -"Glam Rock To Erase MS" - Arrivals

    CENTURY CITY, CA - MAY 18: Actresses Kendall Jenner (L) and Kylie Jenner attend the 19th Annual Race To Erase MS - 'Glam Rock To Erase MS' event at the Hyatt Regency Century Plaza on May 18, 2012 in Century City, California. (Photo by Frederick M. Brown/Getty Images)

  • 19th Annual Race To Erase MS - Inside

    CENTURY CITY, CA - MAY 18: (L-R) Pia Toscano, Kendall Jenner, and Kylie Jenner attend the 19th Annual Race to Erase MS held at the Hyatt Regency Century Plaza on May 18, 2012 in Century City, California (Photo by Mark Davis/Getty Images for Race to Erase MS)

  • 6th Annual Kidstock Music And Arts Festival - Arrivals

    BEVERLY HILLS, CA - JUNE 03: Actress Kylie Jenner attends the Sixth Annual Kidstock Music And Arts Festival at Greystone Mansion on June 3, 2012 in Beverly Hills, California. (Photo by Frederick M. Brown/Getty Images)

  • Seventeen Celebrates Kendall Jenner And Kylie Jenner

    WESTWOOD, CA - AUGUST 02: Kendall Jenner attend Seventeen Magazine's September Issue Celebration with Kendall Jenner and Kylie Jenner at the W Hotel Westwood on August 2, 2012 in Westwood, California. (Photo by Michael Buckner/Getty Images For Seventeen)

  • Seventeen Celebrates Kendall Jenner And Kylie Jenner

    WESTWOOD, CA - AUGUST 02: Kylie Jenner attends Seventeen Magazine's September Issue Celebration with Kendall Jenner and Kylie Jenner at the W Hotel Westwood on August 2, 2012 in Westwood, California. (Photo by Michael Buckner/Getty Images For Seventeen)

  • Seventeen Celebrates Kendall Jenner And Kylie Jenner

    WESTWOOD, CA - AUGUST 02: (L-R) Kendall Jenner, Seventeen Magazine Editor-in-Chief Ann Shoket and Kylie Jenner attend Seventeen Magazine's September Issue Celebration with Kendall Jenner and Kylie Jenner at the W Hotel Westwood on August 2, 2012 in Westwood, California. (Photo by Michael Buckner/Getty Images For Seventeen)