Elizabeth has sent her first ever tweet at the opening of a new science exhibition in London.
At age 88, she would be forgiven for eschewing modern technology, but the Monarch tweeted just after 11.30am this morning:
The official British Monarchy Twitter account immediately confirmed that the Queen herself had indeed sent the message.
And people are loving it; the reaction has been fantastic so far:
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Typically a flag denotes the ownership of a tribe or group over an area.