Timothée Chalamet Seemingly Seen at Kardashian-Jenner Family's Christmas Eve Party amid Kylie Jenner Romance

The 'Wonka' star and the Kylie Cosmetics mogul, who first sparked dating rumors in April, went public with their relationship in September

Timothée Chalamet appeared to celebrate Christmas the Kardashian-Jenner way!

The Wonka star, 27, seemingly attended the reality TV family's annual Christmas Eve soirée amid his romance with Kylie Jenner. In an image posted on a fan Instagram account, a party guest who appeared to be Chalamet could be seen chatting with Jenner, 26, in the background of a Snapchat posted by Landon Barker, Kourtney Kardashian's 20-year-old stepson.

This year's holiday party, which was hosted by Jenner's sister Kim Kardashian, featured a ski-lodge theme, as well as a performance by family friend Kenny "Babyface" Edmonds.

Ahead of the festive gathering, Jenner and 5-year-old daughter Stormi showed off their matching gold looks on the reality star's Instagram Story. The duo donned glittery gold bespoke Dolce & Gabbana dresses — Kylie's a long-sleeved, formfitting style and Stormi's a short-sleeved design with a twirly, floor-length skirt — as they admired themselves in a mirror.

Jenner and Chalamet have been romantically linked since the spring. A source confirmed to PEOPLE in April that the two had been “hanging out and getting to know each other.”

The pair made their first public outing together in September when they attended Beyoncé's Renaissance World Tour in Los Angeles, where they packed on the PDA as they danced and sang along to the "Lemonade" singer's biggest hits.

Related: Timothée Chalamet Jokes About Beyoncé Concert Where He Was Spotted with Kylie Jenner: 'That Was Great'

Chalamet recently joked about the night he and The Kardashians star took their relationship public. During a Dec. 18 interview, MTV personality Josh Horowitz asked the actor to share his favorite concert-going experience of 2023.

When Chalamet drew a blank, Horowitz playfully prompted him, "You went to Beyoncé. That is documented, I will say that."

"That's right," Chalamet replied with a knowing laugh.

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

Related: Kylie Jenner and Timothée Chalamet's Relationship Timeline

Earlier this month, Jenner supported the Dune 2 star at the Los Angeles premiere of Wonka. While she didn't walk the red carpet with Chalamet, she and mom Kris Jenner slipped into the theater after the film's opening credits, a source told PEOPLE at the time.

Following the movie premiere, another source told PEOPLE that Kylie is "incredibly happy" with Chalamet and calls him “her boyfriend.” The insider said Chalamet is “in awe of everything" that Jenner "is accomplishing” and “thinks she is an amazing mom" to Stormi and son Aire Webster, 22 months.

“He is very supportive of her career and she of his,” the source also noted. “They both try to attend important events for each other."

Additionally, the insider said the Little Women star is "very good" for Jenner, adding, "Since dating him, she seems very content, relaxed and focused. Her family loves him."

For more People news, make sure to sign up for our newsletter!

Read the original article on People.