Kendall Jenner and Jordan Clarkson's relationship is "getting more serious".

The 20-year-old model was first spotted with 6ft 5in Jordan, 23, on a night out at restaurant The Nice Guy in West Hollywood last month (Mar16) following reports the two have been dating for months.

Over the weekend (16-17Apr16), they were seen on Snapchat together, and now an insider has revealed their romance is going from strength to strength.

"They keep things low-key when they're in public, but in private they're very much together and affectionate," a source told People.com. "He's really into her."

Kendall was in Indio, California, for the Coachella festival. But while she spent the first night with her friends at the event, she spent the rest of the weekend having some quality alone time with her beau, the insider added.

The statuesque supermodel has already experienced a celebrity relationship, having previously been romantically linked to One Direction's Harry Styles.

But it seems her relationship with Jordan could stick, as Kendall is apparently thrilled with the way her boyfriend treats her.

"They have been secretly dating for months and they are super into each other," a source previously told the publication. "He is super sweet and a total gentleman and Kendall loves that."

Singer Selena Gomez inadvertently confirmed Kendall was no longer single when she was asked about the relationship status of her squad which includes Kendall, Taylor Swift, Gigi Hadid, and Karlie Kloss.

"Taylor is not single, Gigi (Hadid) is not single, neither is Kendall. I am the only single one," explained Selena.

Kendall previously revealed in an interview with DuJour magazine back in 2014 that a sense of humour is top of her priority list when it comes to finding a boyfriend.

"I don’t really have a type. I love tall," she smiled. "And you gotta make me laugh because I can’t make anybody laugh. I’m not a funny person so I need someone to make me laugh."