Fifty thousand One Direction fans are expected to descend on London's Leicester Square for the premier of their new movie.
Hundreds of fans camped out overnight to get the best view of Louis Tomlinson, Niall Horan, Zayn Malik, Liam Payne and Harry Styles.
One Direction have told ITV News that although the comparisons with The Beatles are "flattering", it was not something they agreed with.
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?