The 55-year-old comedian, who is embarking on a world tour, his first in seven years, says he often gets requests from some of the world's biggest stars for freebie tickets.

Speaking to U.K. chat show host Graham Norton, The Office star reveals the worst free ticket demands came from British royals Princes William and Harry, as their security detail must be catered for.

"At one of the last shows I did Madonna, Paul McCartney and Princes William and Harry were on the guest list," he explains. "And, once you add a prince to the guest list you also get seven people with guns get in for free - it's unbelievable!"

It was announced on Thursday (16Feb17) Ricky's new show Humanity is set to hit venues around the globe, after the funnyman added dates in the U.K., U.S., Iceland, Ireland, The Netherlands, Sweden, Denmark, to an already sold-out run of British shows.

Speaking to Graham about how his new show differed from his previous four stand-up shows, Science, Fame, Politics and Animals he said he would be more honest and spontaneous.

"It's (his show) more honest than before - I just walk out and start talking," he revealed. "It's organic and confessional. You could spend a year writing it but it would be worthless. I can change it every night - it's like natural selection and evolution with the audience picking the best hour. If they laugh it stays, if they don't it goes. After 50 gigs it works."

The comedy superstar is set to fine tune his material with two final warm-up shows at London's Leicester Square theatre on Sunday (19Feb17) and Monday (20Feb17) before the tour officially gets underway in Bristol, England on Tuesday (21Feb17).