Serena Williams Brings Her A-Game in a Pink Dress at the Royal Wedding

Prince Harry and Meghan Markle are walking down the aisle at St. George's Chapel in Windsor today. We know about the flowers, the music, and even that our obsession with details about the big day might be a tad unhealthy. We also know guests are now arriving such as Oprah (!!) and Serena Williams.

The tennis champion shared an Instagram of herself getting ready for her "friend's wedding," a.k.a. Meghan Markle and Prince Harry's.

She then snapped herself in a pink Atelier Versace dress and revealed she's bringing her husband Alexis Ohanian to the ceremony (baby Alexis made an appearance too!).

Here she is at the ceremony in all her glory, looking stunning:

It's no surprise that Williams is at the royal wedding; she's a good friend of Meghan's. The two met at DIRECTV's Celebrity Beach Bowl in February 2014.

Back in April, during a interview with Good Morning America, the tennis legend discussed whether or not she'll be attending the royal wedding and she was rather coy.

"I don’t know, I think it's during one of the tournaments, I'll see if I can make it," she said.

Williams was not coy about her feelings for Meghan though, gushing about her friend during the interview.

"I'm obviously super happy for her," Williams said. "She's such a great girl and she is incredibly nice and I couldn't be happier for her."

The feelings are mutual. Early in their friendship, Meghan wrote about her love for Williams on her now-defunct lifestyle website, The Tig.

"She quickly became a confidante I would text when I was traveling, the friend I would rally around for her tennis matches, and the down to earth chick I was able to grab lunch with just a couple weeks ago in Toronto," Meghan wrote.

Today, Serena will be able to witness her friend Meghan say "I do," to the love of her life.

Follow along here as we report on the royal wedding in real-time—from the dress to the tiara to Harry and Meghan's most adorable moments.