(Theo Wargo/Getty Images)

Naomi Osaka showed up and showed out at her very first Met Gala on Monday.

The four-time Grand Slam champion was one of four co-chairs for the event, which celebrated American fashion with the theme “In America: A Lexicon of Fashion.”

Styled in Louis Vuitton in collaboration with designer Nicolas Ghesquière, Osaka drew inspiration from a digital watercolor art piece by her sister Mari. The design incorporates Koi fish as a nod to their shared Japanese heritage.

“The first time I met Nicolas, we spoke not only about me working with Louis Vuitton as a brand ambassador, but also about how we could find ways to work together and even try and co-design,” the tennis star told Vogue.

“So it’s a dream come true for me that our first design collaboration is something I will wear on the Met red carpet. The fact that Nicolas, Mari and I could come together, bringing this to life is something I am very honored to be a part of.”

Mari Osaka elaborated on the look, telling Vogue that its multicultural spirit reflects and celebrates the past, present and future of not only American fashion but also America itself.

“The design we ended up creating speaks to our biracial heritage and in that, I believe it really celebrates who we all are and how we all play a role in the American Dream,” Mari said. “It’s a celebration of cultures, like America itself, a melting pot of so many special and unique elements.”