The petition attracted so much support so quickly that the entire website, petition.paliament.uk, has crashed.
It follows 51.9% of the population voting for Brexit after voters headed to the polls yesterday.
Unsurprisingly, a vast majority of people supporting the petition backed Britain to Remain in the EU.
More than 16 million voters said Britain should Remain, while the turnout for yesterday’s referendum was 72.2%.
If the petition amasses 100,000 signatures – which has already reached – it will require a government response.
All petitions that reach the milestone mark have to be debated by parliament.
Set up by William Oliver Healey, the petition has prompted a huge amount of traffic, causing the entire site to crash this morning.
A House of Commons spokesperson said: ‘UK parliament and the government digital service are aware of the issue and are working on this to ensure the site is working well.’
The petition runs for six months, until November 25.
And if you’re a Bremain fan, there might just be a glimmer of hope that you’ll get a second chance.
Legal blogger Jack of Kent wrote that it is ‘perfectly possible the ‘Article 50 red button is never pressed’ – for example, if there is a second referendum.
Jack of Kent adds that there is ‘a tradition of EU-related referendums being repeated in Member States until there is the ‘correct’ answer’.