I heard this suggestion a while back and i filed it away and kept looking for a different actor to play Lucifer but while I found some blonde, beautiful, androgynous actors, for some reason there just wasn’t this quality in them that Cillian possesses. He’s a damn talented actor which is a must as Lucifer is many things and a total badass and I don’t know, he just has this quality about him that works.
Mary, Canada, 715, Queer: moderately firm grunge, Game of Thrones, Marina and the Diamonds, all things Joss Whedon, Jessica Chastain, The Sandman, Community, Hannibal, Spartacus, and me making dickish comments on pretty much everything. Oh and Tom Hardy. There's a lot of him in here too.
I also did a Sandman Casting a while back which you should check out