On December 12, 1967, Guess Who’s Coming to Dinner,
a groundbreaking movie about an interracial romantic
relationship starring Katharine Hepburn, Spencer Tracy,
Sidney Poitier and Katharine Houghton, opened in theaters.

The film was the final role for Spencer Tracy. He was very
ill during production but insisted on continuing. Filming
of his role was completed just 17 days before his death
from a heart attack in June 1967. He was 67.

Hepburn never saw the completed film, saying it would be
too painful for her.    
    
Guess Who’s Coming to Dinner was nominated for 10 Academy
Awards, including Best Picture, and collected two Oscars,
including Best Actress for Hepburn, the second of her career.