Harriet looked incredible in a white lace midi dress and colour-matching hat. She finished the look with a pink handbag and metallic shoes. Her husband also looked dapper in his morning suit.
The couple also attended Day One of the prestigious racing event, when they were pictured in one of the carriages of the royal procession.
It comes days after the couple tied the knot in a private family ceremony in the Cotswolds.
Most members of the Royal Family attended the event in Cirenchester.
Today, the King and Queen, who have attended every single day of Royal Ascot, led the procession, joined in their carriage by horse racing journalist Brough Scott and his wife, Susan.
Ascot’s final day is well underway, with a host of fashionable and VIP guests showing up as the prestigious five-day event comes to a close.
Among those in attendance today were Ellie Simmonds, Ali Vance, and Charlotte Hawkins.