Billy Harley is a guest star character on Glee: The Unitards, who makes his first appearance in the Season One episode Popularity. He is a professional fashion designer, who has designed various clothing icons that appear world-wide. He appears in a short scene with Patrick Jelly and Justine Callaway at Jackson High, handing Justine a certificate of participation certificate in a fashion designing contest. Justine takes the award thankfully, and Mr. Harley says that she has a real talent. He is also used in Regionals, We're Here! as the Regionals judge alongside Margret Ellis and Jane Dolly.
Mr. Harley is portrayed by famous actor Johnny Depp.