Kylie Jenner stepped out in support of boyfriend Timothée Chalamet at the Dec. 10 premiere of his new movie A Complete Unknown.

Kylie Jenner and Timothée Chalamet are making their love for one another completely known.

An eyewitness tells E! News exclusively that Kylie stepped out in support of Timothée for the premiere of his new film A Completely Unknown at the Dolby Theatre in Los Angeles Dec. 11. 

The couple—who tend to keep a low-profile and has never walked a red carpet together—was spotted holding hands at the after-party, where they spent the whole night together. Timothée, 28, was also seen introducing Kylie, 27, to some of his castmates.

Also there was Kylie’s mom, Kris Jenner, who the eyewitness described as “so supportive” of her daughter.

Kylie and Timmy were first romantically connected in April 2023 and have been dating for over a year. They often enjoy on low-key outings like grabbing dinner, boarding a plane or going to the movies, but they rarely attend such events as high-profile as a movie premiere together.

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Kylie Jenner and Timothée Chalamet Spotted on Dinner Date in Rare Sighting

That being said, the couple did attend the 2024 Golden Globes together back in January. While they opted out of walking the carpet together, they did pack on the PDA for photographers inside the awards show.

Kylie—who shares kids Stormi, 6, and Aire, 2, with ex Travis Scott—recently opened up about shielding her personal life from the public eye.

“Privacy is so important to me in life,” she told British Vogue in August, adding that keeping things private with Timothée “feels so good.”

Christopher Polk/Golden Globes 2024/Golden Globes 2024 via Getty Images

“I learnt at such a young age how to deal with all of this in the best way for me,” Kylie, who was just 10 years old when Keeping Up with The Kardashians premiered in 2007, explained. “So I don’t go crazy, if I am being honest.”

“People ask me, ‘How do you deal with all this?’ I don’t remember a time before,” she continued. “I don’t really remember a time before there were the lights and the cameras.”

For his part, the Dune actor simultaneously values his privacy and also acknowledges that interest in his personal life comes with the territory of being a movie star.

“I can’t say that this stuff doesn’t matter, because my intense fandom has led me to where I am,” Timothée told GQ in 2023. “Sometimes, people are going to be hella confused when you say you’re trying to live a private life.”

Keep reading for more about Kylie and Timmy’s relationship.

Christopher Polk/Golden Globes 2024/Golden Globes 2024 via Getty Images

Table for Two: January 2024

What award show? 

It was only lovers in the building as the 2024 Golden Globes doubled as a TImothée-and-Kylie kiss cam. And there was nary a rumor that could puncture their blissful bubble.

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Live From New York: November 2023

…it’s Kylie and Timothée. The pair arrive separately at the SNL after-party after the actor hosts the show.

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WSJ. Magazine 2023 Innovator Awards: November 2023

The two are all smiles on their date night.

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Desire for Private Life: October 2023

When Kylie’s level of fame was brought up during Timothée’s recent discussion with GQ about privacy, he responded with a laugh.

“This reminds me of that recent South Park episode with the Worldwide Privacy Tour,” he said, referencing the show’s parody of Prince Harry and Meghan Markle. “Sometimes, people are going to be hella confused when you say you’re trying to live a private life.”

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Courtside Kiss: September 2023

It was love-all at the US Open on Sept. 10.

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Doubles Partners: September 2023

Tennis is fine.

Instagram / Gaia Repossi

Making It Official: September 2023

After packing on the PDA at Beyoncé‘s birthday concert in Los Angeles on Sept. 4, the pair attended a star-studded New York Fashion Week dinner together.

Matt Baron/BEI/Shutterstock, Karwai Tang/WireImage

Going Strong: August 2023

E! News confirmed in August that the Kardashians star and the Dune actor were still an item, despite reports claiming they’d called it quits.

Kevin Mazur / MG23 / Getty Images for The Met Museum / Vogue / Rocco Spaziani / Archivio Spaziani / Mondadori Portfolio via Getty Images)

Romance Rumors: April 2023

Kylie Jenner and Timothée Chalamet first sparked romance rumors in April after her split from Travis Scott, with whom she shares kids Stormi, born in 2018, and Aire, born in 2022.