The Queen was reportedly left angry and frustrated after rumours that Prince Philip had died took the internet by storm.
False claims about the Duke's death were widely shared on Twitter late on Friday night (local time).
Buckingham Palace was inundated with media enquiries, with sources telling The Sun the Queen was "extremely upset" with the fake news.
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"The Queen is absolutely fuming over this and thinks it's disgraceful," an insider said, according to The Sun.
"If he was ill, she would be with him instead of starting her Scottish holiday."
The Queen reportedly realised what had happened when her staff kept asking her about her husband's health.
The 97-year-old Duke is said to be recovering well from a recent hip operation.