Twitter UK has confirmed more than 3.6 million tweets were posted on Twitter about One Direction and the One Direction world premiere in London.
One Direction is the most followed UK band on Twitter with more than 14 million followers.
Twitter revealed that the hashtag #1DMoviePremiere was used more than 1.9 million times over the last 24 hours.
Directioners descended into London's Leicester Square in their thousands this evening, for the world premiere of One Direction: This is Us.
One Direction's first movie premieres today ... but what does it have in store for the boyband's fans?