Matthew McConaughey was already celebrating a big Texas Longhorns win as he walked into the US Open Sunday to watch the men’s finals.

McConaughey, 54, was in peak patriotic form to beat the heat with an American flag bandanna wrapped around his head at the USTA Billie Jean King National Tennis Center.

It was love, set and match for Taylor Swift and Travis Kelce, who looked completely at ease as they walked into the stadium in Queens, three days after Kelce earned his first win of the season with the Kansas City Chiefs.

Jon Bon Jovi, Dustin Hoffman, Jon Hamm and Eddie Redmayne were also seen in the stands to watch Italian player Jannik Sinner take on American Taylor Fritz.

Actor Matthew McConaughey wears patriotic bandanna to US Open

Matthew McConaughey rocked an American flag bandanna alongside a star-studded roster to watch the US Open men’s finals on Sunday. (ANGELA WEISS/AFP/Sarah Stier/Getty Images)

McConaughey sported a crisp linen suit for his day courtside, and kept a pair of brown shades over his eyes.

Kelce looked equally fashion forward, wearing a Gucci bucket hat to complement his white cardigan and matching shorts. The happy couple showed some PDA from the comfort of a luxury suite while watching the game.

Jon Bon Jovi smiles as he greets someone at the US Open final wearing a black jacket and white t-shirt

Jon Bon Jovi arrives to watch play between Jannik Sinner, of Italy, and Taylor Fritz, of the United States, during the men’s singles final of the US Open tennis championships. (AP Photo/Kirsty Wigglesworth)

Dustin Hoffman walks to his seat at the US Open in a grey coat and blue button down

Dustin Hoffman arrived on time to watch the epic match between Taylor Fritz and Jannik Sinner. (AP Photo/Seth Wenig)

They were later joined in their luxury suite by Patrick and Brittany Mahomes.

Bon Jovi laughed with pals nearby actor Eddie Redmayne and Anna Wintour while “Mad Men” star Jon Hamm caught the match from his own stellar seats.

Former “American Idol” contestant Ruben Studdard performed an epic rendition of “America the Beautiful” before the game.

Mahomes family and Taylor Swift and Travis Kelce

Travis Kelce, Taylor Swift, Brittany Mahomes and Patrick Mahomes pose for a photo while watching the men’s singles final of the US Open championships. (AP Photo/Julia Nikhinson)

Eddie Redmayne in a tan shirt is seated next to Anna Wintour at the US Open and Billie Jean King sits beneath them with her back to the camera

English actor Eddie Redmayne sat next to Vogue editor Anna Wintour at the US Open. (AP Photo/Seth Wenig)

Jon Hamm in a blue blazer and sunglasses watches the US Open final seriously

Jon Hamm looked serious about the sport as he watched the players lob hits back and forth. (Sarah Stier/Getty Images)

The Grammy Award-winning singer boasted on his social media platforms, “Thank you God for yet another opportunity to share my gift.”