The Royal Family today recognize a prominent trans rights campaigner for their work on mental health.

Susie Green is the CEO of Mermaids UK, a charity that supports transgender children and their families. She was honored at a reception hosted by the Duke and Duchess of Cambridge, along with Prince Harry today.

Though they only spoke briefly, Green tells GSN that when she told Prince Harry what Mermaids does, he said ‘that’s amazing.’

Held on World Mental Health day, Both Prince William and Harry welcomed a number of mental health campaigners. In attendance were big names like Stephen Fry, Ruby Wax, Esther Rantzen and many of those involved in the Royals mental health work and charity the Heads Together campaign.