Timothée Chalamet at “Wonka” London premiere on Nov. 28; Kylie Jenner at WSJ Magazine Innovator Awards on Nov. 1, 2023 in New York City.Photo:Mike Marsland/WireImage; Dia Dipasupil/Getty

Kylie Jenner Supported Boyfriend Timothee Chalamet at the Wonka London Premiere

Mike Marsland/WireImage; Dia Dipasupil/Getty

Kylie Jennershowed up to supportTimothée Chalametas he rolls out his latest film.

At theWonkaworld premiere Tuesday held at The Royal Festival Hall in London, Chalamet, 27 — whowore a colorful Tom Ford suit and Cartier necklace— posed with costars on the red carpet and took selfies with fans.

Though Jenner didn’t pop up on the red carpet, a source tells PEOPLE theKardashiansstar, 26, did attend the U.K. premiere and its afterparty.

Other cast members in attendance included Sally Hawkins, Rowan Atkinson, Hugh Grant, Olivia Colman, Keegan-Michael Key and Calah Lane.

Timothée Chalamet at “Wonka” premiere in London on Nov. 28, 2023.Anthony Devlin/Getty

Timothee Chalamet takes a selfie with fans during the Warner Bros. Pictures World Premiere of “Wonka” at The Royal Festival Hall on November 28, 2023 in London, England.

Anthony Devlin/Getty

“I realized everything I’ve worked on [has had a] grounded seriousness to it, and here I had to loosen up and play, kind of like I did in high school, but I hadn’t done in 10 years or something,” he said. “That was the learning curve. But once it was in full swing, then it felt like we were cookin.' "

Jenneralso recently showed up to watch ChalamethostSaturday Night Livein New York City earlier this month.

Timothee Chalamet during the Warner Bros. Pictures World Premiere of “Wonka” at The Royal Festival Hall on November 28, 2023 in London, England.

The pair have been spotted together in recent months, including at a Beyoncé concert in September, where theykissed in the crowd during the show.

At the time, a source told PEOPLE therelationship is “fun and uncomplicated"for Jenner,who is a mom of two.

“He makes Kylie happy. He has his own life and understands that Kylie needs to prioritize her kids,” said the source. “He is charming, very loving and protective of Kylie. She likes that he is a private guy.”

Kylie Jenner and Timothee Chalamet.Karwai Tang/WireImage ; Jeff Kravitz/FilmMagic

Kylie Jenner and Timothée Chalamet

Karwai Tang/WireImage ; Jeff Kravitz/FilmMagic

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

Last month, in an interview withWSJ. Magazine, in which she revealed her new clothing lineKhy, Jenner said she’s a fan of shows likeGame of Thronesand listedChalamet’s filmDuneas one of her recent favorites. When asked if she’s a fan ofDune, the 2021 movie that also starsZendaya, Jenner said with a smile, “I do love that movie.”

source: people.com