Sandra Dale "Sandy" Dennis (April 27, 1937 – March 2, 1992) was an American actress. She made her film debut in the drama Splendor in the Grass (1961). For her performance in the comedy-drama film Who's Afraid of Virginia Woolf? (1966), she received the Academy Award for Best Supporting Actress.

Dennis appeared in the films The Three Sisters (1966), Up the Down Staircase (1967), That Cold Day in the Park (1969), The Out-of-Towners (1970), God Told Me To (1976), The Four Seasons (1981), Come Back to the Five and Dime, Jimmy Dean, Jimmy Dean (1982), and Another Woman (1988). Her final film appearance came in the crime drama film The Indian Runner (1991).

Dennis had a successful career on stage, appearing in the original stage production of Come Back to the Five and Dime, Jimmy Dean, Jimmy Dean. For her performance in the play A Thousand Clowns, she received the Tony Award for Best Featured Actress in a Play. For her performance in the play Any Wednesday, she received the Tony Award for Best Actress in a Play.

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