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Zoella

PointlessBlog

Caspar

janavlogs

jimchampman

Tom Daly

KSI

Rose and Rosie

Oli White

ThatcherJoe

SprinkleofGlitter

Niki and Sammy

TheKatiePix

jackmaynard1

LookingforLewys

LucyAndLydia

Josh Pieters

New Hope Club

Mark Ferris

The Shades

marcusbutlertv

The Vamps

Oli White

Hello World is a live show in which the UK's biggest YouTube stars perform for and meet with their fans on 28 and 29 October. 

Zoe Sugg started her blog and YouTube channel in 2009 and now has more than 12 million subscribers to her main channel where she talks beauty, fashion and life in general. She's followed her online success with massive sales of a series of young adult novels.

Caption by / Photo by Hello World

Alfie Deyes talks lifestyle, technology and gaming across three YouTube channels. He's also Zoella's other half.

Caption by / Photo by Hello World

Among other things, Caspar Lee interviews big-name celebrities and hangs out with other YouTubers Joe Sugg and Alfie Deyes. He was also seen in the video for Charlie XCX song "Boys". 

Caption by / Photo by Will Patrick

Born in Saudi Arabia and raised in London, Jana vlogs in English and Arabic.

Caption by / Photo by Hello World

Stylish Jim Chapman is a fashion vlogger who's been named GQ's Best Dressed Man of the Year.

Caption by / Photo by Hello World

Olympic diver Tom Daly shares vlogs, exercises and food updates on his channel.

Caption by / Photo by David M. Benett

Gamer and rapper KSI has over 17 million subscribers to his channel.

Caption by / Photo by Hello World

Rose Dix and Rosie Spaughton are a married comedy duo who specialise in improv, and also run a gaming channel.

Caption by / Photo by Hello World

Oli White makes comedy videos for his 2.8 million subscribers.

Caption by / Photo by Hello World

YouTuber Joe Sugg is Zoella's brother and a former flatmate of Caspar Lee.

Caption by / Photo by Hello World

Up-beat mummy vlogger Louise Pentland talks fashion and motherhood on her channels.

Caption by / Photo by Hello World

Identical twins Niki and Sammy Albon share cooking and comedy videos on their channel.

Caption by / Photo by Hello World

Cooking vlogger Katie Pix guides fans through recipes, and has also worked with Jamie Oliver.

Caption by / Photo by Daniel Gardiner

YouTube star Jack Maynard is also a TV presenter and hosts a radio show with his brother, Conor. 

Caption by / Photo by Hello World

Lewys Ball focuses on beauty and fashion looks for boys.

Caption by / Photo by Hello World

Identical twins Lucy and Lydia Connell recreate looks from music videos on their channel. 

Caption by / Photo by Hello World

A friend of Caspar Lee since their schooldays in South Africa, Josh Pieters plays sketches and pranks on his channel and in Snapchat videos fro Comedy Central.

Caption by / Photo by Hello World

Specialising in covers on their YouTube channel, New Hope Club are a pop trio signed to a record deal by popular group The Vamps.

Caption by / Photo by Hello World

Mark Ferris vlogs about his life and posts videos of himself hanging out with best friend Zoella. 

Caption by / Photo by Hello World

Boy band The Shades fill their channel with pop covers.

Caption by / Photo by Hello World

4.5 million fans watch Marcus Butler's comedy channel. You might also have seen him on 2016's "Celebrity MasterChef".

Caption by / Photo by Hello World

Pop act The Vamps will perform one song at Hello World.

Caption by / Photo by Isabel Infantes/PA Images

Vlogger Oli White creates comedy videos.

Caption by / Photo by Dave J Hogan / Getty Images
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