And they're off! Cheltenham Festival kicked off on Tuesday, with royal power couple, Mike and Zara Tindall, leading the charge at the Gloucestershire racecourse. Equestrian Zara, who is a director at Cheltenham racecourse, wowed in a navy coat with mustard yellow accessories on day one. Her husband and former rugby star Mike matched her in a navy suit with a yellow printed tie. The Tindalls were joined by a host of famous faces at the races, including stars from the worlds of sport, TV and fashion. Take a look in the gallery below…