Queen Elizabeth II and Prince Philip have received Covid-19 vaccinations, Buckingham Palace said on Saturday.
British media reported that a royal household doctor at Windsor Castle administered the doses on the royals.
The Queen, 94, and Prince Philip, 99, are among around 1.5 million people in the UK to have had at least one dose of a Covid vaccine so far.
People aged over 80 in the UK are among the high-priority groups who are being given the vaccine first.
The couple have been spending the lockdown in England at their Windsor Castle home after deciding to have a quiet Christmas at their Berkshire residence, instead of the traditional royal family gathering at Sandringham.
Last month, the Queen appeared alongside several other senior members of the royal family for the first time since the coronavirus pandemic began.
In 2020 she went seven months between March and October without carrying out public engagements outside of a royal residence.
During that time, her eldest child, Prince Charles, 72, contracted coronavirus and displayed mild symptoms.
It was also reported that Prince William tested positive in April.
The United Kingdom has approved three vaccines – Moderna, Pfizer-BioNTech and Oxford-AstraZeneca.
It is not known which vaccine the Queen and Prince Philip have received.
Prime Minister Boris Johnson has said the aim is to vaccinate 15 million people in the UK by mid-February, including care home residents and staff, frontline NHS staff, everyone over 70 and those who have been categorised as clinically extremely vulnerable.