Serena Williams wins first US Open set vs Kovinic; celebrities in the stands

Serena looks fashionable but ready for battle in a figure skating-inspired Nike dress composed of six layers to represent all the titles she has won at the Slam, per Yahoo! She also rocked jewels in her hair.

Hugh Jackman looked classy in a navy suit and was on his feet cheering next to Rebel Wilson.

Of course her supportive husband, Alexis Ohanian, is also at the US Open.

Anna Wintour sat in the stands with her famous sunglasses.

Designer Vera Wang was also in attendance.

A mini celebrity in her own right, Serena’s daughter Alexis Olympia, channeled mom with her hair, and wore a watching outfit.

Rebel Wilson has been sharing moments from her time at the tournament on Instagram.

Former President Bill Clinton was spotted in the stands next to German-American sex therapist and talk show host, Dr. Ruth.

Coincidently, after announcing her plans to retire, she is playing at the same location where she won her first U.S. Open in 1999 when she was 17.

Actor Anthony Anderson watched the game next to Jackman.

Boxer Mike Tyson looked happy to be in the stands watching the game.

Director Spike Lee was also there ready to watch some epic swings.