The 20-year-old royal, who inherited her love of carriage driving from her grandfather the late Prince Philip, clearly took the competition seriously in Berkshire on Saturday.
See the cutest photos of royal siblings as kids in adorable matching outfits: from Princess George and Princess Charlotte to Lady Louise Windsor and James, Earl of Wessex
The most important and best connected royal you've never heard of: She owns her own jewellery line and displayed her fashion prowess at the King's Coronation - as she turns 22 dailymail.co.uk - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from dailymail.co.uk Daily Mail and Mail on Sunday newspapers.
Duchess Sophie's edgy leather jacket and laid-back jeans womanandhome.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from womanandhome.com Daily Mail and Mail on Sunday newspapers.