Legendary actress Katharine Hepburn, who won a record four best actress Oscars during her remarkable half-century long career, died Sunday at her home in Connecticut. She was 96. The cause of death was "simply complications from old age," her brother-in-law, Ellsworth Grant, told Reuters. Known as the first lady of American cinema, Hepburn picked up her first Academy Award in 1933 for Morning Glory; she also won for Guess Who's Coming to Dinner, The Lion in Winter and On Golden Pond. Her last film was the 1994 remake of Love Affair, starring Warren Beatty and Annette Bening. "With the passing of Frank Sinatra, and the death of Jimmy Stewart, she really was the last of that breed of Hollywood royalty," says her biographer, Christopher Andersen. "And she was by far the greatest."