Catherine, Princess of Wales attends the Easter Mattins Service at Windsor Castle on April 09, 2023 in Windsor, England. (Photo by Samir Hussein/WireImage)

Kate Middleton stepped out in royal blue over the weekend to attend Easter church services with the royal family. On Sunday morning, the Princess of Wale walked together with Prince William and their three little ones, all coordinated in shades of blue. The walk from Windsor Castle to St George’s Chapel marked a first for Prince Louis, 4, who joined his older siblings Prince George and Princess Charlotte.

Middleton brought back her striking electric blue Catherine Walker coat dress for the service and paired it with monochromatic accessories. The royal has been known to rewear her most beloved style staples and previously wore the vibrant cobalt number on Commonwealth Day in March 2022.

This time around, she teamed her look with a matching hat by Lock and Co. featuring a bow on the side. Middleton completed her ensemble with light beige pumps, a coordinating blue clutch and dainty gold and sapphire drop earrings.

Catherine, Princess of Wales and Prince Louis attend the Easter Mattins Service at Windsor Castle on April 09, 2023 in Windsor, England. (Photo by Samir Hussein/WireImage)

Middleton got a little daring with her manicure, opting for red nails. Senior royals traditionally tend to veer away from anything other than a natural nail hue. The late Queen Elizabeth II famously preferred the neutral shade of “ballet slippers” for a clean, more uniformed look.

Prince William and Prince George dressed in dapper navy suits, while Prince Louis made his royal Easter debut in a navy suit jacket, light blue shorts knee-high navy socks and black loafers. Princess Charlotte wore a navy doubled-breasted peacoat over a blue floral frock with bright blue tights and black Mary Jane flats.

(L-R) Prince George of Wales, Prince William, Prince of Wales, Princess Charlotte of Wales, Prince Louis of Wales and Catharine, Princess of Wales attend the Easter Mattins Service at Windsor Castle on April 9, 2023 in Windsor, England. (Photo by Yui Mok – WPA Pool/Getty Images)

This year’s Easter festivities marked the first for the royal family since Queen Elizabeth’s death. The celebrations also fell on the two-year anniversary of Prince Philip’s passing. King Charles and Queen Camilla kicked off the procession of senior royals when they arrived to the service, ahead of the upcoming May 6 coronation.