Tennis greats Venus and Serena Williams are a walking testament to the power of sisterhood. They often compete against each another on the court but manage to stay close despite efforts by the media to portray their friendly rivalry as something more. It's a pleasure watching anyone play a sport with the kind of intensity, style and power these two display season after season.
Venus, the oldest sister, is currently ranked third in the world. She is an Olympic gold medalist who turned pro when she was 14. As of this writing, her sister Serena has won a total of 23 career Grand Slams. Watching these ladies play is an inspiration. Is it any wonder that they're No. 1 on our list of fabulous sister acts?