That is, according to her half-brother Brody Jenner.
When asked about the 18-year-old model's relationship with the One Direction singer (and his reputation as a heartbreaker), Brody told New York Daily News. "I hate to tell you this, but Kendall will be doing the heartbreaking."
"I'm sure she's having a fun time with him," he added. "She has a very level head, great head on her shoulders. But they are both so young."
Kendall and Harry have been spotted hanging out in the likes of London and New York City as of late, with the duo spending some time together across the pond after having a "blast" at popular gay bar Therapy in New York City recently.
Both the boy-bander and the Keeping Up With the Kardashians star have played coy about their relationship with Kendall saying, "We're friends. He's cool," when she attended the 2013 American Music Awards last month.
Harry has also stayed mum when Piers Morgan asked him if he's dating the brunette beauty, saying, "I mean, we went out for dinner, but no, I guess," referring to a dinner date in which they were spotted leaving Craig's restaurant in West Hollywood, Calif., on Nov. 20.
Meanwhile, Kendall kicked off her holidays with a hike Sunday morning, posting a stunning shot of herself on Instagram striking a yoga post atop a cliff overlooking the ocean.
Speaking of the holidays, Kris Jenner played mum when asked if Harry would be attending their annual Jenner-Kardashian Christmas party, saying, "I do not know who's coming to that party right now, but it'll be fun. Friends and family."