• Prince George and Princess Charlotte attended the Easter Sunday service at St. George's Chapel at Windsor Castle with their parents
  • Prince William, Kate Middleton and their two eldest children coordinated in blue outfits
  • Queen Elizabeth and Prince Charles opted out of attending the mass

Kate Middleton and Prince William brought their two eldest children to another royal family holiday outing.

The Duke and Duchess of Cambridge's eldest son Prince George, 8, and only daughter Princess Charlotte, 6, made their official Easter debut when they joined the royal family at Easter Sunday church service over the weekend.

The four Cambridges coordinated in blue outfits for the service at St. George's Chapel at Windsor Castle Sunday, Entertainment Tonight reported.

Prince George wore a dark blue suit that matched his dad's. However, the younger royal used a blue tie, while the Duke of Cambridge opted for a red one.

Princess Charlotte donned a blue floral print dress with light blue stockings and a dark blue cardigan. Middleton opted for a light blue coat dress and a matching blue headpiece. The duchess completed her look with blue pumps.

Princess Charlotte held on to her father Prince William's hand when the family was photographed on their way to the church. Prince George, meanwhile, walked between their mother and father.

After the service, the third in line to the throne practiced his handshake when he greeted the Dean of Windsor, David Conner.

The couple's 3-year-old son Prince Louis didn't join his parents and siblings for the holiday outing. Some royal fans wondered why the youngest Cambridge wasn't with his family.

"Will someone tell me why Louis is not included in these events? He was absent from Prince Philip's memorial also," one tweeted.

Other users pointed out that Prince William and Middleton likely think that their youngest is still too young to appear in royal events, noting that the recent mass marked Prince Louis' older siblings Prince George and Princess Charlotte's first public Easter service.

"Love the royals together at St. George’s for Easter service. Missing the Queen and Prince Louis, though," another tweeted.

"I want to see Prince Louis so bad, but I am glad he’s not here so that I can be extra surprised at how grown he is when we see his picture this weekend on his birthday," a fourth royal fan wrote, referring to Middleton's tradition of sharing new portraits of her children on their birthdays.

"What a breath of FRESH AIR. Our lovely Cambridges on today’s Easter Service at Windsor. (Missing Prince Louis though)," another commented.

The Duke and Duchess of Cambridge also wished everyone a Happy Easter through social media. They shared on Twitter and on their Instagram Story a snap of a card on their official stationary with the words "Happy Easter" on the front.

Queen Elizabeth II, who has mobility issues, Prince Charles and his wife Camilla, Duchess of Cornwall did not attend the service. The Cambridge family was joined by Princess Eugenie, Zara Tindall and her husband Mike Tindall, and Peter Phillips and his daughters.

Prince William's uncle, Prince Edward, was in attendance with his family, including his wife Sophie, Countess of Wessex and their children.

Prince William and Duchess Kate have started to bring their eldest children to more royal events.

Prince George and Princess Charlotte made their royal Christmas debut in 2019 and joined the royal family at the Service of Thanksgiving held at Westminster Abbey on March 29 honoring their great-grandfather Prince Philip, who died in April 2021 at age 99.

Kate Middleton, Prince William, Prince George and Princess Charlotte
WINDSOR, ENGLAND - APRIL 17: Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge attend the Easter Matins Service at St George's Chapel at Windsor Castle on April 17, 2022 in Windsor, England. Jeff Gilbert-WPA Pool/Getty Images