AceShowbiz - Kylie Jenner and Timothee Chalamet may be reuniting for New Year's Eve. New pictures featured the "A Complete Unknown" star going out and about in Los Angeles on Monday, December 30.

In the snaps, Timothee was seen stopping by the gas station in the city. The actor opted for a casual look when pumping gas, wearing a striped long-sleeved maroon top with a white T-shirt underneath. He completed his style with navy pants and a white cap.

While it's unclear if Kylie and Timothee will spend the New Year's Eve together, another report shared more insight into the couple's romantic relationship. "They had an early Christmas celebration together before Kylie spent Christmas Day with her family," an insider noted to PEOPLE.

The source added, "It took Kylie a long time to introduce him to her kids. He's part of the family now though. Her kids know him as a 'friend.' " The informant further shared, "Her relationship with him is great and very easy. He's super supportive of her priorities and he works around her schedule a lot. They are both committed to making it work."

The new reports came after Kylie and Timothee made a rare public appearance together at the "A Complete Unknown" after-party in Los Angeles. The Kylie Cosmetics founder showed support to her boyfriend when she joined him at the premiere of his new movie on December 10 at the Dolby Theatre.

According to an eyewitness, the pair packed on PDA during the date night by holding hands throughout the night. The "Call Me by Your Name" actor additionally introduced his girlfriend to some of his castmates.

It was also said that the lovebirds, who have been dating since last year, were "pretty affectionate with each other." As Timothee settled into his roped-off section of the party, the mom of two sat in his lap with her arm around his shoulders and they shared a quick kiss. At the end of the night, they departed the party together hand-in-hand.