One Direction star Harry Styles and his rumored reality TV girlfriend, Kendall Jenner have reportedly called it quits.

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An insider told The Sun that the split was because of conflicting schedules.

"Kendall has been focusing on her modeling and Harry is preparing for work on the band's fourth album, as well as their stadium tour. The reality is that with everything they both have going on, it's impossible to sustain anything serious."

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Rumors of their split started swirling when The Keeping Up With the Kardashians star was spotted in Styles' stomping grounds at London Fashion Week with him nowhere in sight. But he was in the area as he supported his friend and ex-girlfriend Cara Delevingne as she rocked the runway for the festivities. While it might sound like he got a little caught up, Styles didn't support Jenner because he didn't want to spark rumors that they were an item.

The source added, "Harry purposely didn't go to the Topshop show or have his planned party so people wouldn't speculate about him and Kendall."

While the insider also said, "There's been no major fallout," it has been rumored that Jenner and Styles' relationship wouldn't last because of her mother, Kris Jenner.

A separate source claimed that Styles was advised several times to stay away from the Kardashian/Jenner family because of Kris' "momager" habits.

"Kris will push them to do joint business ventures. She'll make sure she benefits off them...People who date the Kardashians end up cursed. Harry is loved around the world and his friends don't want Kris to sink her teeth into them."

Tags: Kendall Jenner Harry Styles