Serena Williams was named as one of Glamour magazine's 2009 Women of the Year.
At the star-studded event, Emmy award-winning talk show host, Tyra Banks, presented Serena Williams, with her award.
During her speech, she encouraged the women in the crowd, "You can do whatever you want to do. The most important belief is self-belief."
Among the women honoured were Rihanna, Maria Shriver, Stella McCartney, First Lady Michelle Obama, Serena Williams, Laura Ling, Euna Lee, Maya Angelou, Jane Aronson, Marissa Mayer, Amy Poehler and Susan Rice.