The Duke of Cambridge, who is second in line to Britain's throne, will appear of the cover of the July edition of 'Attitude'.
The 33-year-old posed for the magazine after inviting its team of lesbian, gay, bisexual, transgender (LGBT) and other sexual minority groups to his Kensington Palace home here to listen to their experiences of bullying and its effect on mental health.
"No one should be bullied for their sexuality or any other reason and no one should have to put up with the kind of hate that these young people have endured in their lives," he said.
"What I would say to any young person reading this who's being bullied for their sexuality: don't put up with it - speak to a trusted adult, a friend, a teacher, Childline, Diana Award or some other service and get the help you need. You should be proud of the person you are and you have nothing to be ashamed of."
The July issue of 'Attitude' went to press on June 8, days before Omar Mateen killed 49 people at Pulse, a gay nightclub in Orlando, Florida, and the issue will hit the stands on June 22.