The Duke of Cambridge's appearance on the cover of Attitude looks set to be one of the magazine's best-selling issues.
William featured on the front of the July edition of the UK's leading gay magazine as he spoke out against homophobic bullying.
The Duke - the first member of the Royal Family to be photographed for the cover of a gay publication - told Attitude: "No one should be bullied for their sexuality or any other reason."
A spokeswoman for the magazine 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."
The Duke invited the magazine to bring members of the LGBT+ community to Kensington Palace in May to listen to their experience of bullying and its mental health effects.
He called on young people being bullied to seek help.
"No one should have to put up with the kind of hate that these young people have endured in their lives," he said. "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."
Celebrities who have appeared on the cover of Attitude include One Direction's Liam Payne, model David Gandy, singer Gary Barlow and actors Daniel Radcliffe and James Franco.