Today doctors call it "dissociative identity disorder" but when Chris Costner Sizemore was diagnosed and treated for it over 60 years ago, it was simply called "multiple personality disorder."

The movie "TheThree Faces of EVe" came out in 1957, changing Sizemore's name to EveWhite. Her "alters" were Eve Black .. and Jane.  Actress Joanne Woodward won an Oscar for her portrayal of Eve.

It later came out that Sizemore had something more like 22 personaliities, not just three.

I mer in 1989, when she wrote a book called A Mind of My Own.  IT told the story of how, with years of psychiatric help, she had integrated her several personalities.