In these interviews, Jennifer Lawrence admits to having multiple personalities:
If you can, watch the entire film The Three Faces of Eve (1957), based on the life of Chris Costner Sizemore (read more here). Joanne Woodward gives an astonishing performance, for which she won an Academy Award. The public was introduced to multiple-personality disorders in the 1950s, as this was the time that secret mind-control experiments were begun by the government.
An HBO documentary on MPD: