A YOUTUBE sensation turned bestselling author will need an entire arena for a signing of his new book.

Brighton’s Alfie Deyes has taken the world of video blogging, or vlogging, by storm with 4.9 million subscribers on YouTube, 1.5 million Twitter followers and 27 million views of his videos per month.

The 21-year-old has now added the title of bestselling author to his repertoire with his new hybrid journal and activity book shifting 30,000 copies in two weeks.

The founder of the Pointless Blog Youtube channel will be taking up residence at the ExCel Arena in London tomorrow to meet his legions of fans and sign copies of the new release - entitled Pointless Book.

Mr Deyes has become the first author to have a standalone signing at the 5,000 capacity exhibition centre at the docklands.

A signing at Waterstones in Piccadilly where 8,000 teenage girls showed up to get his autograph had to be cancelled for safety reasons as they could not cope with the demand.

David Beckham held a signing in the same store which saw a crowd of 700.

To the national media, he said: “ExCel is massive, it is scary but it is amazing. The Waterstones event was so much bigger than any of us thought it would be.

“I thought only a few hundred people would show up. It is just crazy. Every single event I do really shocks me at how engaged the viewers are.”

Mr Deyes began blogging from his bedroom when he was just 15 and now makes a living from his hobby – with advertisers willing to pay to access vloggers’ massive audiences.

Vloggers can reportedly earn up to £20,000 from advertisements on their videos or get payouts of £4,000 for plugging products in individual videos.

His Youtube channel features offbeat vlogs, skits and challenges and has gone down a storm with teenagers.

Mr Deyes birthday on Wednesday saw #happybirthdayalfie trending worldwide alongside international breaking news.