'80s sitcom star turned religious activist Kirk Cameron is not a fan of homosexuality and he isn't shy about sharing his feelings on the subject.

During a new interview with Piers Morgan the "Growing Pains" heartthrob who transitioned from a "teen-idol-atheist in Hollywood and became a devoted follower of Jesus Christ in the middle of [his] career" explained that he believes homosexuality is "unnatural... I think that it's detrimental, and ultimately destructive to so many of the foundations of civilization."

On the issue of marriage equality Cameron remarked, "Marriage was defined by God a long time ago. Marriage is almost as old as dirt, and it was defined in the garden between Adam and Eve -- one man, one woman for life till death do you part. So I would never attempt to try to redefine marriage. And I don't think anyone else should either. So do I support the idea of gay marriage? No, I don't."

When asked what he would do if one of his six kids told him, "Dad, bad news, I'm gay," Cameron responded, "I'd sit down and I'd have a heart to heart with them, just like you'd do with your kids."

Morgan shot back, "I'd say, 'That's great, son! As long as you're happy.' What would you say?"

Cameron offered, "I wouldn't say 'That's great, son, as long as you're happy.' There are all sorts of issues we need to wrestle through in our life... Just because you feel one way doesn't mean we should act on everything we feel."

Watch the full interview above.

Check out what celebrities and "Growing Pains" fans thought of Cameron's remarks below: