Serena Williams is ending 2024 by celebrating a big milestone.

The tennis champ, 43, has been documenting her weight loss journey on Instagram after giving birth to her second daughter, Adira River, with husband Alexis Ohanian in August 2023. From the start, she said one of the goals was fitting into the maxi denim Valentino skirt she bought when she was pregnant.

On Dec. 30, the WYN Beauty founder revealed that she had accomplished just that, sharing a new video of her being able to wear the skirt.

“I have an audience today for this big moment of will it or will it not fit,” she began.

Serena Williams Revisits Valentino Denim Skirt Try-on Amid Weight Loss Journey: ‘Saying a Little Prayer’

As she started unbuttoning the skirt, she emphatically said it was tight the last time she attempted to squeeze into it. While managing to pull up one side of the skirt to her waist, she said that the fit felt “better already.”

After successfully getting the waistband over her behind and securing the button and zipper, Williams observed herself in the mirror, even bending down after her friend encouraged her to “drop it like it’s hot.”

“It just fits. An ounce more, it wouldn’t,” said Williams. “I need to give myself credit,” she added.

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Williams began her try-on mini series in January and continued to share updates with her fans every few months. Before reaching her goal this month, Williams previously tried on the skirt over the summer. While she struggled to zip it up completely at the time, she said she’d still “made a lot of progress.”

Serena Williams/Instagram

Throughout her weight loss journey, Williams, who is also mom to daughter Olympia, 6, has been showing off her new figure.

In an Instagram clip shared on Dec. 7, filmed at a Wyn Beauty activation in Miami, the former athlete flirtatiously danced around in a sporty minidress that showed off her slimmer body.

But looking good isn’t Williams’ only motive with her new diet and fitness regimen. She also wants to manage her health — and has a new fitness related resolution.

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Serena Williams attends a 2024 Paris Olympics pre-party hosted by Louis Vuitton on July 25, 2024.

In an exclusive interview with PEOPLE, Williams, who partnered with Lingo, a continuous glucose monitor from Abbott, this fall, revealed that one of her goals for 2025 is to run a half-marathon. “It’s just like I have to do something competitive. I miss tennis like crazy,” shared Williams, who stepped back from professional tennis two years ago.

As for why she’s so open about wanting to fit into the clothes she wants to wear: “Athletes and musicians, I feel like sometimes we think that we’re untouchable and that’s just not true,” she said.

“I literally don’t think of myself any different than anyone else. And I love to try to post relatable content. And I’m not doing it on purpose, it’s just who I am. I have the same struggles trying to fit in these darn skirts and I want to follow my health levels too. And I just think it’s so cool for people to see that, especially for me growing up in Compton.”