Catherine of Wales, Princess of Wales, returned to British public life for the first time since battling cancer on Saturday, attending a military parade in London to mark the official birthday of King Charles III.
Kate is known to travel in a state carriage with her three children at the start of the annual event.
The Queen-designate, 42, then appeared on the Buckingham Palace balcony to entertain the rain-braving crowd.
It has been almost three months since Prince revealed that he was undergoing chemotherapy. He has not been in public since last year’s Christmas Day service.
Speaking on Friday night, Kate said she was making “good progress” with her treatment, which will take a few more months, but was “not out of the woods yet”.
The Prince added: “I look forward to attending the King’s Birthday Parade with my family this weekend and will be attending public events throughout the summer.
The news of Kate’s cancer comes just weeks after it was revealed that Britain’s head of state, Charles, had also been diagnosed with the disease.
They also did not disclose the type of cancer they had.
Charles, 75, was given the green light to resume public service in April after doctors said they were “encouraged” by his progress.
His first interactions were with staff and patients at a London cancer centre.
Earlier this month, he attended a memorial in northern France to mark the 80th anniversary of D-Day.
However, unlike previous years, when the troops paraded in ‘Trooping the Colour’, this year Charles attended in full military regalia, accompanied by Queen Camilla in a carriage.
His eldest son and heir William, 41, also wore the uniform.
Wearing a white dress and hat, Kate was seen arriving in a car ahead of the parade with William and their children – Prince George, 10, Princess Charlotte, nine, and Prince Louis, six.
The flight, which included a variety of aircraft including the aerobatics of the Red Arrows, which accompanied the Royal Air Force – red, white and blue steam, ended after several hours.
The mansions were visible from the balcony, and Kate smiled at the dots as she stood with the rest of the family.
British newspapers are delighted to be back on the front page of their Sunday editions later that day for the first time.
Super Trooper headlines tabloid The Sun. The Post on Sunday called it “a day that lifted the nation’s heart”.
“Our fair lady carries the spirit of the nation,” said the Daily Telegraph, with a photo of Kate beaming at William on the balcony.