Kylie Jenner and Timothée Chalamet’s romance is becoming more serious by the day.

“Kylie and Timothée have been dating for a while now, and things have become fairly serious over the past few months,” a source exclusively tells Us Weekly. “Kylie knows they both have really busy schedules, but make as much time for each other as possible.”

The insider also stated that Jenner, 26, finds it “really important” to “be there and show support for Timothée, especially when he’s working on something as epic as the Wonka film,” adding, “She’s one of his biggest supporters and was so glad she and Kris were able to be there.”

Kylie and her mother Kris Jenner attended the Wonka movie premiere in Los Angeles on Sunday, December 10. Chalamet, 27, looked stunning on the red carpet in a black turtleneck and a chocolate crocodile print suit. (On Friday, December 15, the new musical picture featuring Chalamet as Willy Wonka will be released in theaters.)

“Kylie really didn’t want to make a huge scene when she attended the Wonka premiere, so she decided to skip the carpet and make a low-key entrance,” a source familiar with the matter told the publication. “This night was all about Timothée and she didn’t want to take away from that in any way.”

It’s not the first time Kylie has quietly supported her boyfriend at one of his events, like the Wonka premiere. Kylie paid tribute to Chalamet’s position as Saturday Night Live host at the afterparty last month.

The Kylie Cosmetics mogul wore a black off-the-shoulder top and black leggings to the event, while Chalamet looked joyful in a purple jacket and blue sweatshirt.

Chalamet, on the other hand, supported Kylie when she was named 2023 Brand Innovator at the WSJ Innovator Awards earlier that month for her new clothing line, Khy. Despite strolling the red carpet separately, the two were spotted seated close to one another inside the event.