Darnell worked long hours at the studio during filming, and according to her older sister she started loathing Preminger, which did not ease production. This and the heavy dieting resulted in exhaustion and a serious illness in November 1946. Her shooting schedule lasted until March 1947, and she collapsed on the set twice. "Forever Amber" did not live up to its hype, and although it became a success at the box office, most reviewers agreed that the film was a disappointment. Darnell was disappointed in the film's reception; it did not gain her the recognition she desired.