Queen Elizabeth and senior members of the royal family - along with newcomer Meghan Markle, Prince Harry's American fiancee - have attended a Christmas church service as a crowd of local residents gathered.
Markle smiled and gave a brief wave in her first public appearance with the Queen. She and Harry stopped to talk with several locals on their way back to the Queen's residence.
The Queen was joined by her husband, Prince Philip, and close family members including grandson Prince William and his wife, Kate, who is expected to give birth to the couple's third child in the spring.
William and Kate also stopped to talk with area residents who had waited in the cold for a chance to give flowers to the royals. The crowd was larger than in past years, perhaps because of curiosity about Markle.
From left in background, Britain's Prince William, Kate, Duchess of Cambridge, Meghan Markle and Prince Harry arrive to attend their traditional Christmas Day. Source: AAP
The Queen, 91, and Prince Philip, 96, missed last year's church service because they were suffering from the flu, but they seemed in good health during Monday's brief appearance. Prince Philip walked back to the Queen's house with other royals, but the Queen opted to be driven.
The Queen planned to use her annual Christmas message to pay tribute to the way the cities of London and Manchester pulled together after extremist attacks earlier this year.
Remarks pre-recorded by the monarch will be televised later on Christmas Day in the United Kingdom and the 51 other Commonwealth countries.
Excerpts released by Buckingham Palace indicate the Queen praises Manchester, hit by a suicide bomber in May, and London, which endured attacks on Parliament, London Bridge and other landmarks.
Prince Harry and his fiancee Meghan Markle arrive to attend the traditional Christmas Day service. Source: AAP
"This Christmas, I think of London and Manchester, whose powerful identities shone through over the past 12 months in the face of appalling attacks," she says.
The Queen says it was her privilege to visit young survivors of the attack on a Manchester concert hall as they were recovering from the blast which claimed 22 lives.
"I describe that hospital visit as a 'privilege' because the patients I met were an example to us all, showing extraordinary bravery and resilience," she says.
The Queen also pays tribute to her husband, who this year stepped down from most public duties because of his advancing years. She praises him for his "support and unique sense of humor."
The Queen and Prince Philip are spending the holidays at their country estate in Sandringham, 175 kilometres north of London.
The royal family has a private lunch scheduled after the church service. They traditionally exchange gifts on Christmas Eve.
This is the first Christmas the family is joined by Markle. The actress and Prince Harry plan to marry at Windsor Castle in May.
The Queen says in her brief broadcast that the royal family looks forward "to welcoming new members into it next year".
Prince Harry and his fiancee Meghan Markle. Source: AAP