KATE MIDDLETON was all smiles as she headed to Sunday service with Prince William — with King Charles and other senior royals also turning out at the Balmoral-area church.

The Princess of Wales, 44, was photographed arriving at Crathie Kirk, a parish church in the Scottish village of Crathie. Kate sat in the front passenger seat as William, also 44, drove them to the service.

Their children were with them too: Prince George, 13, Princess Charlotte, 11, and Prince Louis, 8, rode together in the back.

King Charles III, 77, and Queen Camilla, 79, were also pictured heading to church on Sunday. The couple travelled with a personal driver, with Charles and Camilla seated in the back.

It was a full royal turnout, with Timothy Laurence and Princess Anne, Prince Edward, Duke of Edinburgh, and his daughter Lady Louise Windsor also attending.

The family gathering comes four days after Prince Harry, 41, and Meghan Markle, 45, said they’ll be relocating back to the UK at the end of the month for “an extended period” with their children, Prince Archie, 7, and Princess Lilibet, 5. A source said the palace was made aware of the move and that Charles was informed last Sunday.

Another insider claimed Charles is the reason for the relocation, with Archie and Lilibet already enrolled in school in Britain. While Charles is said to “look forward” to more time with them personally, the Sussexes’ status as private, non-working members of the royal family is not expected to change, and they’ll reportedly live in a “non-royal residence” while continuing their business ventures. Last month, Harry, Meghan and their children reunited with Charles during a UK visit — the first time he’d seen his grandchildren in four years — but they had no contact with William and Kate.