Boris Johnson has been ranked third in a list of the most influential political figures following research by the advertising agency Telegraph Hill. It measured online activity, appearances in traditional media such as newspapers and television and reputation.
The London Mayor was behind comedian Russell Brand in second place and Prime Minister David Cameron in first.
Chris Moon, the head of insights and analytics at Telegraph Hill said: "This analysis doesn't just show the people with the most Twitter followers: it looks at who's talking about political issues and has the platforms to make themselves heard."
Russell Brand has been shortlisted as one of the world's great thinkers.
American magazine Prospect named the comedian as one of fifty people on their 'World Thinkers 2015' list; a compilation of intellectuals, philosophers and economists from across the globe.
The actor turned activist's venture into politics - particularly in his work with disaffected young voters - is thought to be one of the reasons behind his nomination.
Previous winners of the award include biologist and prestigious author Richard Dawkins.
Find out who else made the list here.
Rumours are swirling comedian Russell Brand is considering running for Boris Johnson's job as Mayor of London.
Brand has apparently told friends he wants to succeed Boris in 2016, according to the Mail on Sunday.
A spokesman for Brand declined to comment.
But if he did stand for mayor it would be a U-turn for a man who has previously described voting as a waste of time.
It was reported Brand, who regularly joins protests, is said to be considering standing on an independent "anti-politics" ticket.
His new book, Revolution, provides some clues on what the comic's stance stance would be should he decide to be a candidate.
In it he admits he "can't get my head around economics", declares his support for "collectives", and wants to ban fracking and the monarchy.
Brand caused controversy last week when he said he was "open-minded" about the idea the US government was behind the 9/11 attacks on BBC's Newsnight.
Comedian Russell Brand was caught up in a row at a London party after he made a joke about fashion firm Hugo Boss and its links to the Nazis.
The comic was picking up an award at the GQ Men of the Year Awards. But he also criticised the German firm, who sponsored the show, for making uniforms for Hitler's regime.
Brand was then reportedly kicked out of the aftershow party in central London.
Pop star Katy Perry has revealed that Essex boy Russell Brand told her he was divorcing her in a text message.
The couple split just 14 months after getting married in India in 2010.
Perry, 28, told the US edition of Vogue magazine that Brand, 38, was not comfortable with the singer being his equal.
"Let's just say I haven't heard from him since he texted me saying he was divorcing me December 31 2011," she told the magazine.
Perry said the British comedian was "hysterical in some ways until he started making jokes about me" when he did not know that she was in the audience at one of his shows.
The Firework singer said she invited Brand "time and time again" to join her on tour.
She told the July issue of Vogue: "I think a lot of times strong men do want an equal, but then they get that equal and they're, like, I can't handle the equalness. He didn't like the atmosphere of me being the boss on tour."
Russell Brand appeared in a sleeveless top and showed off his tattoos as he gave evidence to MPs today. The actor appeared before the Home Affairs Select Committee at the House of Commons to talk about how he recovered from drug addiction.