Billy Zane has been bald for a long time. He was wearing a rug when he starred in The Titanic and may have been bald years before that.
That may be a possibility. I went to high school with a kid who was a sophomore and he was going bald. A wig, rug or toupee are indispensable to actors and actresses. Even a talk show host like Wendy Williams wears them, too.