Some of Katharine's more outstanding roles:
Jo March in Little Women (1933)
Eva Lovelace in Morning Glory (1933)
Alice Adams in Alice Adams (1935)
Terry Randall in Stage Door (1937)
Susan Vance in  Bringing Up Baby (1938)
Linda Seton in Holiday (1938)
Tracy Samantha Lord in The Philadelphia Story (1940)
Tess Harding in Woman of the Year (1942)
Amanda Bonner in Adam's Rib (1949)
Jane Hudson in Summertime (1955)
Bunny Watson in The Desk Set (1957)
Mary Tyrone in Long Day's Journey into Night (1962)
Christina Drayton in Guess Who's Coming to Dinner (1967)
Queen Eleanor of Aquitaine in The Lion in Winter (1968)
Mrs. Violet Venable in Suddenly, Last Summer (1959)
Ethel Thayer in On Golden Pond (1981)