It's been a long time coming, but we finally have a first trailer for Conor Horgan's documentary on Panti Bliss.

Almost four years in production, Queen of Ireland tells the story of Ireland's march to marriage equality and Rory O'Neill's journey from rural Ballinrobe to the glittering lights and stardom of Hong Kong and, finally, as a national treasure in the form of Panti Bliss.

Take a look at the first trailer.