According to ComicBook.com, Sophie Turner (AKA Sansa Stark), was not allowed to wash her hair during filming of 'Game of Thrones'.
Turner is a natural blonde, but has been getting her hair dyed red for the role since the series began in 2011.
In an interview with InStyle magazine, Turner said, “... for the first few seasons I was allowed to wash my hair because I was an aristocratic young girl. Towards season 5 they started asking me to not wash my hair and it was really disgusting.