He has not spoken about it publicly but it is not exactly a state secret. Mia made a fuss on Twitter about Anderson Cooper coming out publicly because he travels to the Middle East as does Ronan, so as long as he does his Darfur work I imagine he'll keep that private, if just to please her.
Have you seen his best friend? She's fabulous. I'm not even sure straight people can [italic]see[/italic] La Carmina.