The Other Boleyn Girl (2008)
She's not the only character on this list who loses her head in love (both literally and figuratively), but Anne Boleyn, the unfortunate second wife of Henry VIII, finds her singular depiction by Natalie Portman in this 2008 drama, also starring Scarlett Johansson. I may or may not have purchased a diamond encrusted cross necklace upon re-watching it last week.