Wig is a required accessory. The actor who played Lucius Malfoy in the films, Jason Isaacs, used a blonde wig that was long, straight, and split in the center. He admitted to tilting his head back to maintain his hair straight. Malfoy wore a brown wig for most of the first film. When he dons the invisibility cloak at his son's birthday party, he wears a black wig. This confirms that he can transform his appearance at will without having to worry about his hair style changing. He also had wavy hair when he was a child, so it is possible that this is how he naturally grows his hair. However, since he gets shaved heads in all other scenes where he is not wearing a disguise, we can assume that he has some sort of hair replacement system in place. Lucius Malfoy's character is one of the most popular characters in Harry Potter culture. Fans have created many theories about his relationship with Harry's mother, Lily Potter. Some believe they were married in secret because Voldemort knew she would die at the end of the book and didn't want her to be able to be with someone else. Others think they were just good friends who enjoyed each others' company and didn't need a marriage license to do so.