Ben Summerskill, the head of the U.K.-based LGBT lobbying group Stonewall, issued a response to the U.K.'s Telegraph, saying, "Rupert should get out a little bit more to see the facts for himself."

"There is absolutely no evidence that the kids of gay parents suffer in the way they are being brought up or in how they develop," he added.

A rep for the 53-year-old thesp was unavailable for comment.

Everett's no stranger to stirring controversy. Case in point: in 2010 he made headlines after blasting Jennifer Aniston for making what he considered were "tasteless" romantic comedies. As well, he said in a 2009 interview with the British paper The Guardian that he would not advise other actors to come out.