Coco Gauff just won her first Grand Slam, defeating Aryna Sabalenka of Belarus in the US Open women's final on September 9.

At just 19 years old, Gauff is officially the youngest player to even reach the US Open final since Serena Williams won her first Grand Slam at 17 years old in 1999. “[Serena and Venus Williams] are the reason why I have this trophy,” Gauff said during a press conference after the match. “They allowed me to believe in this dream.”

Immediately following her victory, Gauff collapsed on the court in happy tears to roaring applause from the crowd. Obviously, when an American wins at the US Open, the crowd is going to go wild, but perhaps no spectators were as enthused as Gauff's own mother, Candi Gauff, and…Amanda Seyfried?

In one TikTok video shared by the official US Open account, Seyfried—along with Cara Delevigne, Rachel Brosnahan, and Mindy Kaling—can be seen watching the match with rapt attention and shouting praise at Gauff. “You got it,” Seyfried seems to say with her hands in the air before adding, “Oh, shit!”

Now, that is how you watch tennis. Of course, the rest of the onlookers in the video were impressed as well, and Delevingne could be seen battling tears. “Stars watching stars,” read the post's caption. The photos kind of say it all….

Plenty of other public figures also took a chance to celebrate the young tennis star, including former president Barack Obama, who recently posed for a photo with Gauff and Michelle Obama at the 2023 US Open. “Congratulations to US Open champion, @CocoGauff,” he captioned the snap on Instagram. “We couldn’t be prouder of you on and off the court—and we know the best is yet to come.”

Serena Williams congratulated Gauff on her Instagram Stories, while Viola Davis shared a sweet video of Gauff attending the US Open at just 12 years old before transitioning to a clip of Gauff raising her trophy in the air at 19. “Woooooooohoooooo!!!!!!! BADASS!!!! Congratulations @cocogauff!!! PROUD 👏🏿🙌🏿🔥🎾🏆❤,” Davis captioned the Instagram clip. A similar video was also shared by the US Open TikTok account.

Congratulations, Coco Gauff!

Originally Appeared on Glamour