Billie Jean King, the founder of the Women's Tennis Association, interviewed on the red carpet.
Madison Keys, a potential future World No.1, posed for photos on the red carpet on the way in.
Fellow teenager and fellow potential future No.1 Eugenie Bouchard also posed for some pictures.
The event featured all of the No.1s - as well as some very, very notable players - on the stage.
The players all had their turn with the microphone, answering questions and giving speeches.
Chris Evert and Martina Navratilova reminisced about their incredible rivalry - 80 career meetings.
Tracy Austin with the mic. Austin was the fourth No.1, after Evert, Goolagong-Cawley and Navratilova.
King took the podium to speak of the phenomenon she helped start four decades ago - the WTA.
Several notable names gave speeches at the event, including WTA Chairman & CEO Stacey Allaster.
The No.1s, other notable players and names all posed for a legendary group photo at the event.
Margaret Court and Evonne Goolagong-Cawley.
Tracy Austin, Chris Evert and Betty Stove.
Martina Navratilova and Jana Novotna.
Monica Seles and Jelena Jankovic.