"They are very serious. Everyone in her family loves him," a source tells PEOPLE following the couple's PDA-filled outing at the 2025 Golden Globes

"She knows that his career is so important to him." "She wants to be by his side for it all," the insider continued, adding that Kylie is "really making an effort" to do so. The source also said she's "the happiest" and described her relationship with Timothée as "very serious.

While Jenner didn’t accompany Chalamet to the A Complete Unknown premiere in Paris, continuing to keep a more or less low profile where they can, the couple shared an intimate date night straight after. They were photographed enjoying dinner at chef Cyril Lignac’s restaurant, before heading back to the elegant Hotel Royal Monceau.

Kylie Jenner is embracing her role as Timothée Chalamet's biggest supporter as he navigates a major career milestone. The notoriously private couple has recently stepped out together for a series of rare public appearances,