Timothée Chalamet and Kylie Jenner living together

Timothée Chalamet may be racking up awards for his acting, but a source tell Page Six his most convincing role yet is playing house with Kylie Jenner.

We hear that the couple — once widely seen as a Hollywood PR stunt — have been living together in L.A. for over a year.

While there has been speculation that the pair could have tied the knot, our insider says they have not wed. But “it’s like they’re basically married already.”

“They’re obsessed with each other and always together,” says the source, who tells us Chalamet is involved in the lives of her children Stormi, 7, and Aire Webster, 3, who she shares with Travis Scott.

Chalamet called Jenner “his partner” in his acceptance speech for Best Performance by a Male Actor in a Motion Picture Comedy for “Marty Supreme” at the Golden Globes this weekend.

“For my parents, for my partner, I love you. Thank you so much,” he said.

The pair have remained mostly private throughout their three years of dating, but have been making more public appearances lately.

The “Kardashians” star joined Chalamet at the Critics’ Choice Awards at the beginning of this year, where the actor declared his love for her after winning best actor for “Marty Supreme.”

“Lastly, I’ll just say thank you to my partner of three years — thank you for our foundation. I love you. I couldn’t do this without you. Thank you from the bottom of my heart,” he said, with Jenner mouthing, “I love you” back.

In December, they stepped out in matching orange leather Chrome Hearts outfits at the premiere of his new Josh Safdie flick.

A source told Page Six earlier this month that Chalamet – a born and bred New Yorker who has been raised around fame — is a grounding force for lip kit mogul who grew up on reality TV.

“After living and growing up really fast, being with someone like Timmy is a wholesome, welcoming stable relationship for Jenner,” said the source.

The pair were first spotted together in January 2023 at a Jean Paul Gaultier fashion show during Paris Couture Week. That September, they were seen at a Beyoncé concert.

Back in October 2022, Chalamet had bought an $11 million Beverly Hills mansion from pitcher Justin Verlander and model Kate Upton. He has not put it on the market.

Reps for Chalamet and Jenner did not respond to request for comment.