"Excited to reveal my campaign for the @PUMA Fierce, a lightweight trainer with zero excuses, available starting 4/1," she wrote. "The next level starts here #ForeverFierce."
Jenner has previously dyed her hair blonde, emerald green and teal. Puma announced the star's campaign in February after her brother-in-law, Kanye West, declared there "will never be a Kylie Puma anything."
"I am pleased and excited to be able to confirm that Puma is indeed working with Kylie Jenner," global director of brand and marketing Adam Petrick said.
West, who married Jenner's half-sister Kim Kardashian in 2014, designs for Puma rival Adidas.
"I didn't know what to do with myself," Jenner recently told People. "[My] mom [Kris Jenner] told me I was great with business, and I should get involved with that. She is an amazing businesswoman herself ... so I took her advice."
"When I am not working, I get anxiety," she said. "When I get up in the morning, I can't wait to start working!"
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Jenner came to fame on E! series "Keeping Up with the Kardashians" and has since launched her Kylie Cosmetics line. The collection includes the star's wildly successful Kylie Lip Kits, which sold out in 30 minutes last month.
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