US army whistleblower Chelsea Manning is to appear on the cover of next month's Vogue magazine.
The former soldier was given 35 years in prison in 2013 for a major security leak and came out as transgender just a day after sentencing.
Ms Manning has since been released and her gender identity has sparked worldwide debate.
Rebecca Tallon-De Havilland is Ireland's first transgender person to have a full sex change.
“I think the only time that I realised I was an actual boy was when I went to boarding school at seven, it was an all-boys school. It was a huge shock,” she said.
“I just felt like a girl and my private prayer at night used to be that I would wake up like my sister in the morning,” she added.