Serena Williams was the belle of the ball as she arrived for the 2015 Wimbledon Tennis Champion's Dinner. The 33-year-old Grand Slam winner arrived at the lavish event in a figure hugging floor-length gown, which showed off her curvaceous figure. Her knock out appearance came after Harry Potter author JK Rowling jumped to her defense when a Twitter troll said Williams was 'built like a man.' Witty Rowling replied with a super sexy pic of Serena saying "Yeah, my husband looks just like this in a dress. You're an idiot."