Timothée Chalamet and Kylie JennerKarwai Tang/WireImage; Dia Dipasupil/Getty Images

Kylie Jenner and Timothée Chalamet are taking things to the next level.

While the couple are enjoying keeping their relationship private, a source tells The Messenger the duo is getting “more serious” and they have taken the step of meeting each other’s families.

“She’s been supporting Timothee in private and is extremely proud of him,” the source said. “She has never dated a serious actor before and it’s a new world for her. She admires his hard work and loves how passionate he is. They are still going strong and it’s gotten more serious.”

“Kylie flew out to London for a quick trip to show support for Timothée for his new film,” the source added. “When it comes to work, they are keeping their lives very separate. They still enjoy flying under the radar and keeping the relationship private. They both have met each other’s families, but still keep her kids separate at this point.”

Last month, Jenner attended the London premiere of Wonka, in which Chalamet stars as the titular aspiring chocolatier in writer/director Paul King’s prequel to Roald Dahl’s 1964 novel Charlie and the Chocolate Factory.

After they were first romantically linked in April, a source told The Messenger in September that the pair was “still keeping their relationship low-key” while “having a lot of fun.”

Another insider has since said the couple is “doing very well,” adding: “It’s an organic, natural relationship and she feels comfortable around him.”

“They’re still learning each other, exploring one another and seeing where things go,” said the source. “It’s a positive, healthy, trusting relationship where there’s no skepticism on her side. He’s met the whole family and Kris [Jenner] likes him.”

The Messenger has reached out to representatives for Jenner and Chalamet.