The young royals whooped and hollered as the Queen's horse Estimate claimed victory in Royal Ascot's Gold Cup - the first time in the race's 207-year history that it has been won by a reigning monarch.
But they weren't the only ones who looked super haps about the historical victory.
The Queen herself look particularly jubilant as Estimate dashed to the finish line in first place... And Team MyDaily were hard tasked not to break out into a massive grin along with the hat-adorned aristocracy. They look so darn joyful!
But, come on, Ladies' Day isn't really known for the horse racing is it? It's ALL about the hats. So let's take a peek at all the OTT wears...