Louise snagged the 1976 Best Actress Academy Award for her bone-chilling performance as Nurse Ratched in 'Cuckoo’s Nest.' The film, which swept all 5 Oscars in each of the major categories, centered around the tense relationship between Ratched and Randall McMurphy, a psych ward patient played by Jack Nicholson.
McMurphy was an anti-authority-free spirit who was a threat to Ratched's strict rules to keep the other patients in line. In the end, McMurphy won over the hearts and minds of the patients ... only to have a vengeful Ratched order him to be turned into a lobotomized vegetable.
The Nurse Ratched character was hand-picked as the fifth-greatest villain in movie history by the American Film Institute -- and she was runner-up to the Wicked Witch of the West as the greatest villainess.
After the success of 'Cuckoo's Nest,' Fletcher landed roles in other popular films and TV shows, such as "ER," "Picket Fences," "A Perfect Man," "Shameless" and "Star Trek: Deep Space Nine." She was nominated for an Emmy for "Fences."