Katharine Hepburn's professional partnership with Spencer Tracy lasted 25 years, ending with the former's death.
Katharine Hepburn . In the 1940s , she was contracted to Metro-Goldwyn-Mayer , where her career focused on an alliance with Spencer Tracy . The screen-partnership spanned 25 years and produced nine movies . A 26-year affair with her co-star Spencer Tracy was hidden from the public .