one direction this is us premiereIan Gavan/Getty Images

One Direction fans are intense -- this should be widespread knowledge by now. But if you still need more proof that Directioners are out-of-their-minds in love with the British band, look no further than today's "One Direction: This Is Us" world premiere in London.

Besides the fact that some of the most dedicated fans camped out overnight to gain front-row red carpet access, according to the UK's Mirror, once Louis Tomlinson, Zayn Malik, Niall Horan, Harry Styles, and Liam Payne finally arrived at the event, chaos and tears ensued.

1D was gracious as could be to their loyal fan base, signing autographs and taking pictures, all while trying to avoid getting teenage tearstains on their blazers.

"One Direction: This Is Us" is a documentary/concert movie that takes Directioners behind the scenes of the band's O2 Arena show in London and behind the rocket-propelled success of the "X-Factor" contestants turned international rock stars.

Check out the squeal-worthy photos of the premiere below, and get ready to swoon when the movie hits theaters August 30.

One Direction: This Is Us - Clip No. 1
categories Movies