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Since their first appearance on "Keeping Up With the Kardashians" in 2007, Kendall and Kylie Jenner have become stars in their own right, thanks to lucrative modeling campaigns and a thriving teen fashion empire.

PHOTOS: Kardashians as kids

When Us Weekly spoke to their father Bruce Jenner at the Performance 3D demonstration in New York on Monday, the 62-year-old Olympian admitted his girls' careers are so busy they may not pursue higher education.

"If they want to go to college, certainly, I think it's a good idea. But I'm not the advocate of, 'You've got to go to college!'" Bruce said. "I think by the time they graduate from high school, they will probably be in a position to go right to working."