In 2007, Miller denied to "InStyle" that he was gay. He later came out as gay in August 2013, when he posted a letter on GLAAD's website. In the letter he turned down the offer to go to the Saint Petersburg International Film Festival. The reason was because he felt "deeply troubled" by the Russian government's treatment of its gay citizens. This was referring to anti-LGBT laws passed banning "propaganda of nontraditional sexual relations."