The demand for cheap electricity went up over the bank holiday weekend as millions of residents tuned in to watch Prince William marry Kate Middleton.
According to statistics released by National Grid, there was a surge of 2,400 MW at the time when the newly wedded couple reached Buckingham Palace - the forth largest surge in demand due to a TV programme ever.
This was equal to one million kettles being boiled at the same time, the energy management company said.
John Carnwath, power system manager at National Grid, commented: "It's been a fascinating day to work in our control room, seeing the huge impact on electricity demand of millions of people across Britain being brought together by William and Kate's wedding.
"We're proud of the role we have played in helping the nation share their big day," he added.
According to the BBC, the royal wedding attracted more than 24 million viewers in the UK alone, with millions more watching worldwide.
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