1. Extremely supportive friend Gigi Hadid returned to watch her pal Serena Williams play again: Gotham / Gotham/GC Images 2. Meghan Markle (aka the Duchess of Sussex) was also in attendance to support Serena... Gotham / Gotham/GC Images 3. ...and she greeted Serena's husband, Alexis Ohanian, with a hug: Clive Brunskill / Getty Images 4. Look how hype she is for her friend! I love it! Gotham / Gotham/GC Images 5. Cara Delevingne and Ashley Benson looked adorable in the crowd... Gotham / Gotham/GC Images 6. ...and even snuck in a few kisses: Gotham / Gotham/GC Images 7. Alessandra Ambrosio watched the match with so much focus: Gotham / Gotham/GC Images 8. Irina Shayk shayked her fists during the men's final... Gotham / GC Images 9. ...and Karlie Kloss klossed her arms. (I'm done with the puns, I swear!) Gotham / GC Images 10. Uma Thurman and her son, Levon, enjoyed a fun mother–son outing: Gotham / GC Images 11. Peter Hermann and Mariska Hargitay had the ultimate date night: Gotham / GC Images 12. Lindsey Vonn and her fiancé, hockey player P.K. Subban, did too: Gotham / GC Images 13. Paul Bettany (famous tennis actor of Wimbledon fame) and Jennifer Connelly were shook by the match: Gotham / GC Images 14. Anna Wintour gazed off into the distance! Gotham / GC Images 15. Trevor Noah looked stressed! Gotham / GC Images 16. And, finally, Michael Douglas and Catherine Zeta-Jones enjoyed the match. Catherine appeared to be attempting to catch a tennis ball... Gotham / GC Images 17. ...and Michael was all about taking a selfie: Gotham / GC Images 18. "Hey, Catherine, come look at my selfie!" Gotham / GC Images And that's a wrap on US Open 2019! See you next year!