A little drop of rain can hardly hurt these hat-wearing horse lovers. The 139th Kentucky Derby got off to an energetic, rainy start Saturday as Churchill Downs filled with avid fans ready to win—or not. This year Derby-ers will not only be celebrating the famed race, but also the 40th anniversary of Secretariat's unforgettable win. But if the media storm surrounding female jockey Rosie Napravnik is any indication, she's likely to steal the show. With over 1,500 wins under her belt, she is the most successful jockey entering the race. While Napravnik's only the six woman—in the race's history—to participate in the event, something tells us she's ready to give the boys a run for their money.