IT WAS pop pandemonium at the premiere of One Direction's 3D film This Is Us.
Tweens screamed themselves silly, Twitter went into overdrive, an overly enthusiastic fan arrived in a bridal gown, Simon Cowell joked about those pregnancy rumours and boy band stardom reached its pop pinnacle.
Niall Horan, Liam Payne, Zayn Malik, Harry Styles and Louis Tomlinson looked like a monochrome teenage dream in co-ordinating black and white ensembles.
Mullingar man Niall bopped along to Ke$ha tracks in black skinny jeans, high top sneakers and a varsity style jacket.
Harry wore a heart-shaped polka dot shirt and blazer while Liam went for a heavy duty leather jacket.
Louis opted for a smart tuxedo jacket and ankle-grazing jeans while Zayn looked sharp in a wool and leather coat.
And the boys had a special message for their Irish fans. "Hello Dublin!" Niall said. "Thanks for the support and see you in Croke Park!"
"It's actually unbelievable," he continued. "This is the best night of our career."
The boys first formed on The X Factor back in 2010.
And music mogul and mentor Simon Cowell was one of the first to walk the red carpet. "This is a dream. I feel like a father," he said jokingly.
It was Cowell's first public appearance in the UK since it emerged he's fathered a baby with his Lauren Silverman.
Rochelle Hume, Ronnie Wood, Little Mix, McFly and JLS also attended the premiere.
Back in Dublin, hundreds of screaming Directioners crowded outside Cineworld in Parnell Street ahead of the film to watch the live link-up with London.
Amy McDarby (14) and Ciara Fallon (14) could barely contain their excitement. "I've been shaking all day. I started crying in the car when we were on the way in," Ciara said.
The documentary follows the boys' lives on tour and charts their success. Despite their global fame, director Morgan Spurlock said fans will be surprised by how 'normal' the band are.
"There is no air of success that permeates this movie. You see five guys who are the same five guys they were three years ago," he said.