Timothee Chalamet and Kylie Jenner pack on the PDA courtside as they seal Knicks' victory with a passionate kiss

Kylie Jenner and Timothee Chalamet sealed the New York Knicks' victory with a kiss as they watched the actor's beloved team reach the NBA Finals from some of the best seats in the house on Monday night.

Not to be outdone by Travis Kelce and Taylor Swift, the actor, 30, and reality TV star, 28, headlined the celebrity New York Knicks fans at Game 4 of the NBA Eastern Conference Finals on Monday night.

The couple, who have been dating for three years, were swept away by the jubilant scenes sharing a romantic moment during the Knicks' dominant 130-93 victory, which sealed the team's sweep of the Cleveland Cavaliers.

The loved-up pair packed on the courtside PDA, sharing a passionate kiss the moment they realized that the Knicks were heading to the Finals.

The billionaire business mogul even planted a sweet peck on her beaming boyfriend's cheek, flinging her arms around the elated Hollywood star as he watched the on-court action.

Madison Square Garden is renowned for its iconic celebrity row. Yet, the Knicks' A-list supporters made the trip from the Big Apple to Cleveland.

And Chalamet, a renowned Knicks fanatic, was not missing out on the chance to see his beloved team reach the NBA Finals for the first time in 27 years.

The Marty Supreme star had snubbed the Met Gala this month to watch the Knicks beat the Philadelphia 76ers earlier in the playoffs, leaving Jenner attend the fashion extravaganza at New York's Metropolitan Museum of Art alone.

But the mother-of-two was ever the doting girlfriend on Monday night as she joined Chalamet, even sporting a blue Knicks t-shirt.

She cut a casual figure, pairing the New York merchandise with light blue jeans, simple black sandals and a black Chanel purse.

Meanwhile, Chalamet dressed for the occasion in a vintage-style black leather jacket, which was embroidered with New York's logo.

Later in the night the duo were seen having an animated celebration while sitting next to 30 Rock star Tracy Morgan.

Chalamet appeared to have made the journey to Cleveland with director Spike Lee, sharing a selfie soon after they touched down in Ohio.

Lee, a devoted supporter of the franchise since the 1970s, was decked out head to toe in Knicks' blue and orange, including a particularly vibrant bucket hat.

The filmmaker was seen greeting Rick Brunson, a Knicks assistant coach and the father of superstar Jalen Brunson, as the pair stood chatting on the sidelines before tipoff.

Ben Stiller had been criticized for skipping Game 1 of the conference semifinals in order to attend the Met Gala. But he wasn't making the same mistake again on Monday.

The actor shared a video to social media two hours before tip off, showing him traveling to Cleveland.

The star-studded display comes after Cleveland's attempts to bock New York's celebrities from the front row.

Fat Joe, another famous Knicks superfan, revealed that the Cavaliers had even taken his tickets off him after he purchased a front-row view for Game 4.

'We had bought some courtside tickets to the game and once they found out it was superfan Fat Joe, they was like, I can't sit courtside,' he told ESPN's NBA Today.

'New York Knick fans can't sit courtside. They took the tickets away courtside after we purchased it, so shame on you all.'

New York's influx of famous faces comes after the Cavaliers enjoyed the support of their own superstars on Saturday night.

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Swift and Kelce had enjoyed a courtside date night for the basketball showdown between the Knicks and Cavaliers as they cozied up to one another in their front-row seats during Saturday night's Game 3.

Kelce is a native of nearby Cleveland Heights and grew up rooting for Cleveland sports teams. In addition to his love for the Cavaliers, he's previously thrown out the first pitch at a Guardians baseball game.

He was particularly animated throughout the evening.

At one point in the evening, he was captured chugging a can of Garage Beer - the brand that he and brother Jason Kelce co-own - in an act that appeared targeted at giving the crowd an extra boost for the night, as well as an free and easy promotion for the larger.