The Other Boleyn Girl (2008)
Natalie Portman starred alongside Eric Ban and Scarlett Johansson in The Other Boelyn Girl, a period piece about Anne Boleyn and King Henry VIII. In the film, Portman can be seen with a French Hood and her hair down. However, since the movie was set in the 1500s, Portman should have had her hair pulled back with the veil covering it entirely.
Dirty Dancing (1987)
Even though the cast of Dirty Dancing was indeed having the time of their lives, no one in costuming seemed to notice that Baby's denim shorts were a bit ahead of their time. The film took place in 1963, but denim shorts wouldn't become a fashion staple for another two decades.