Tennis star who has won every major tournament and became the oldest number-one champion ever in 2013. She's captured 23 singles titles to go along with 14 doubles titles alongside her older sister Venus Williams.
She began playing tennis when she was five years old, and was home-schooled by her father, who was also her coach.
She set the record for most singles titles at the Australian Open with six.
She earned her first career grand slam singles title by defeating