London
A royal source said the vaccinations were administered on Saturday by a household doctor at Windsor Castle.
The source added the Queen decided to let it be known she had the vaccination to prevent further speculation.
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.
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.
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