Speaking at the Seattle Public Library on Saturday, actor-writer Kirk Cameron encountered a small group of protesters who objected to his pro-faith, pro-family and pro-country messages during his children's book event, with one individual hoisting a large sign that said, "You are growing to be a real pain — you know that."

The sign's message and lettering was a play on "Growing Pains," the TV sitcom in which Cameron first came to fame as a young actor.

Cameron told Fox News Digital in a message on Sunday, "One nostalgic protester — protesting a book about humility? — lugged a huge sandwich board that said that I was 'growing to be a real pain.' Nicely played, sir!" added Cameron.