All about Sydney Sweeney’s custom Knicks jersey for NBA Finals Game 5

Syd’s got spirit.

Sydney Sweeney and boyfriend Scooter Braun made the trip to San Antonio Saturday night to cheer on the Knicks in Game 5 of the NBA Finals against the Spurs — and the “Euphoria” star made sure to dress the part.

The actress, 28, didn’t choose any regular merch to show love to her boyfriend’s team; she opted for a custom Jalen Brunson jersey-turned-tee that hugged her curves and kept things casual in dark-washed jeans.

The corset-inspired style was created by Awear Apparel, with Boston-based designer Kate Marr telling Page Six Style exclusively that she had just 24 hours to craft the custom piece.

The devil was in the details, however, as Sweeney upped the ante with a cobalt blue vintage Must de Cartier Tank watch and a stack of orange ($1,850) and diamond rings ($1,850) by New York-based jeweler Fry Powers.

Sweeney and Braun, 44, attended Wednesday night’s historic Game 4 in NYC, with the music exec revealing that his girlfriend surprised him with tickets “in the same section” as his dad and brother so he could “share it” with them.”

At the MSG game, Sweeney matched her beau in a windbreaker, and again added a little flair with her accessories, sporting vintage reworked Manolo Blahnik heels featuring a tiny basketball charm.

“Still buzzing and haven’t slept all night as that was one of the greatest nights of my life. That is what sports and basketball are all about. It brings people together,” Braun captioned an Instagram post, which featured videos of him celebrating with his dad, Ervin Braun, and his brother, Adam Braun.

The couple, who sat a few rows behind Taylor Swift, showed major PDA and excitement at the clutch win.

They then took a quick trip to Los Angeles, where the actress celebrated her Syrn lingerie brand at a pop-up event Friday.

She chose a blue-and-white outfit that included her Must de Cartier watch — and again couldn’t keep her hands off Braun.