Prince William's magazine cover is set to be one of the best-selling issues of Attitude magazine.

Prince William

Prince William

The 34-year-old royal was interviewed and photographed for the gay magazine for the cover story on their July issue and the magazine has revealed it has been "overwhelmingly well received" by many people.

A spokesperson for the publication said: "Early indications are that it will be one of our best-selling issues and has been overwhelmingly well received.

"We have also received many letters, emails and tweets in support of this issue."

During his chat with Attitude magazine, the Duke of Cambridge - who has Prince George, two, and Princess Charlotte, 14 months, with his wife Duchess Catherine - pledged support to those being bullied for their sexuality.

He said at the time: "The young gay, lesbian and transgender individuals I met through Attitude are truly brave to speak out and to give hope to people who are going through terrible bullying right now. Their sense of strength and optimism should give us all encouragement to stand up to bullying wherever we see it.

"What I would say to any young person reading this who's being bullied for their sexuality: don't put up with it. You should be proud of the person you are and you have nothing to be ashamed of."

And editor Matthew Todd also revealed the Prince was making history by appearing in the magazine as a royal.

He said: "During my time as editor of Attitude, I have met parents whose child has taken or lost their life after being bullied for being LGBT+ or even just perceived to be LGBT.

'I am very happy that the future King of The United Kingdom agrees this must stop and I would urge parents in particular to raise their voices in their communities to ensure that every school protects - really protects - all children."