World No. 1 and 18-time major champion Serena Williams got to watch first-hand as friend and tennis competitor Caroline Wozniacki finished the New York City Marathon. Now it’s Williams turn to run a race.

The 18-time Grand Slam champion will join running enthusiasts from South Florida and around the country for the inaugural Serena Williams Ultimate RUN South Beach, taking place on Sunday, December 14th. The Quarter Marathon (6.55 miles), 5K Run/Walk and Ultimate KIDS Dash will bring together runners of all ages and abilities to support the Serena Williams Fund, which provides assistance to families affected by violent crimes and providing underprivileged youth around the world with the highest quality of education available to them.

“Miami is very close to my heart — I’ve lived and trained here throughout my career — and it’s such an electric and diverse city,” said Williams. “I really hope Miami will come out to support this fun event and run with me to help youth in need, so that they’re able to thrive and live fulfilling lives.”

On Sunday, December 14th, famed Ocean Drive will be closed to traffic for the Ultimate RUN’s scenic start and finish lines. The course will take runners through Miami’s South Beach. Those scheduled to participate include U.S Olympian and American middle distance runner Shannon Rowbury, and the Canadian long-distance Olympic runner, Cam Levins American track coach and retired long-distance runner, Alberto Salazar, is expected to fire the starting gun as a tribute to kick off the new event. Caroline Wozniacki, Venus Williams, Andy Murray and other special guests are expected to attend the new event.

“Our goal is to think of what would make the ultimate run,” says Marc Wachter, the event’s executive producer. “We are thrilled to be working with Serena for the first annual Serena Williams Ultimate Run. One of the world’s number one female athletes behind our inaugural event in Miami Beach, together with participants from the Nike Oregon Project, will make this run the Ultimate experience.”

The event is pen to runners of all ages.