London's Tate Modern has confirmed June 2016 for the big debut of its new look and expanded gallery space. On June 16 next year 5,000 lucky school kids will be the first people to enter the new gallery, getting an exclusive sneak-peek at the £260 million revamp ahead of the general public on June 17.

Designed by architects Herzog & de Meuron, the new expansion is slated as the most important new cultural building in the UK since the British Library in 1998 according to The Guardian.

The ambitious project was originally meant to be completed for the 2012 Olympics, and will see a complete rehang of the permanent collection, offering 60% more gallery space and room for performance and interactive art.

"There will be old friends and new friends – Pablo Picasso, Joseph Beuys and Mark Rothko will be joined by artists introduced to the public by Tate Modern in recent years, including Saloua Raouda Choucair, Meschac Gaba, Daidō Moriyama and Cildo Meireles." The Tate's director Sir Nicholas Serota said.

"The new Tate Modern is an instrument that will allow us to present a changing perspective on the world, offer a rich variety of experiences to visitors and give opportunities to artists to explore new ways of making and showing their work," Serota added.

Find out more via the video below.