The film and TV star passed away on Sunday at a Santa Barbara nursing home, a funeral director confirmed to The AP.
Her daughter said that Francis died of complications of pancreatic cancer, the Los Angeles Times reports.
Francis was diagnosed with lung cancer in 2007.
Forbidden Planet was hailed by critics as one of the best sci-fi films of its time. Francis played Altaira 'Alta' Morbius in the 1956 classic, also starring Walter Pidgeon and Leslie Nielsen.
In 1966, Francis won a Golden Globe and was nominated for an Emmy for her lead role in the TV show Honey West.
She also appeared in several other films, including Blackboard Jungle, Bad Day at Black Rock and Rogue Cop.
Francis made several appearances on TV shows, including Gunsmoke, Studio One and The Golden Girls.
