After putting his foot in his mouth in an interview earlier this month in which he seemed to suggest that gay marriage could lead to incest, the opinionated Borgias star is now expressing unqualified support for same-sex couples' right to marry.
"I think gay marriage is wonderful. I think any reason that holds anybody together in a relationship is great. If it works as glue, if it makes you feel better, if it makes you feel you love your partner more, it's great," Irons told the BBC this week.
The actor subsequently posted an open letter stressing he's not "anti-gay" and admitting that he doesn't have a "strong feeling either way" about the issue.
Now, Irons says he's been "badly informed" about the subject.
"I actually don't know the difference between a civil partnership, which we have in this country, and marriage, which is what the government just voted on. I don't know what the difference is," the Oscar winner told the BBC. "I felt I should've buttoned my lip."