Pregnant Kate, 31, sported a short camel-colored coat that covered her baby bump. She also wore her faithful Aquatalia brown suede boots and one of her favorite winter hats – the Lock and Co Betty Boop, which she donned to the close friend Mark Tomlinson's recent wedding in Switzerland.
As for her earrings, they were designed by Kiki McDonough, a favorite jeweler of hers. They are cushion-cut citrine diamond earrings from the jeweler's classic range, Eternal, and they retail for £1,200 (or approximately $1,800).
Kate wore diamond earrings from the designer on her first Christmas Day as a married woman in December 2011.
Kate and William, 30, arrived just before lunch at the prestigious Cheltenham Festival, about 120 miles west of London. At the races, a horse owned in part by Mike Tindall, the rugby-playing husband of William's cousin Zara Phillips, is taking part.
Craig Norwood / Splash News
The couple's arrival was heralded by enthusiasm from excited racegoers when they emerged from their car in the rain. Also in attendance: Zara Philliip's mum, Princess Anne.
Her visit came as it was announced that scouting volunteer Kate will attend a training event in the north west of England next week.
Craig Norwood / Splash News Online