Why Famous: Received four Academy Awards for Best Actress for her performances in "Morning Glory" (1933), "Guess Who's Coming to Dinner" (1967), "The Lion in Winter" (1968) and "On Golden Pond" (1981).
- 1928-09-12 Katharine Hepburn's NYC stage debut in "Night Hostess"
- 1934-03-16 6th Academy Awards: "Cavalcade", Charles Laughton and Katharine Hepburn win, host Will Rogers announces "Come and Get it Frank" and wrong Frank gets up
- 1938-02-16 "Bringing Up Baby" film directed by Howard Hawks, starring Katharine Hepburn and Cary Grant, is released
- 1940-12-26 "The Philadelphia Story" film directed by George Cukor, based on the Broadway play of the same name and starring Cary Grant and Katharine Hepburn, is released (Academy Awards Best Actor 1941)
- 1951-12-26 "The African Queen", directed by John Huston and based on the 1935 novel of the same name, starring Humphrey Bogart and Katharine Hepburn, is released in LA, California (Academy Awards Best Actor 1952)
- 1952-02-20 "African Queen" film directed by John Huston, starring Humphrey Bogart and Katharine Hepburn is released in the US
- 1967-12-11 "Guess Who's Coming to Dinner", directed by Stanley Kramer, starring Spencer Tracy, Sidney Poitier and Katharine Hepburn, premieres in NYC (Hepburn - Academy Award for Best Actress 1968)
- 1969-04-14 41st Academy Awards: "Oliver", Cliff Robertson & Katharine Hepburn and Barbra Streisand win (1st ever tie for best actress)
- 1976-03-04 2nd People's Choice Awards: John Wayne & Katharine Hepburn win (Motion Picture) and Telly Savalas & Carol Burnett win (TV)
- 1981-06-02 Barbara Walters famously asks Katharine Hepburn “If you were a tree, what kind of tree would you be?”
- 1982-03-29 54th Academy Awards: "Chariots of Fire", Henry Fonda & Katharine Hepburn win
- 1983-03-11 9th People's Choice Awards: Burt Reynolds, Jane Fonda & Katharine Hepburn win (Motion Picture) and Tom Selleck, Linda Evans & Loretta Swit win (TV)
- 1993-03-04 Katharine Hepburn admitted to hospital suffering from exhaustion
- 1993-03-08 Katharine Hepburn released from the hospital after exhaustion