Katharine Houghton, American actress and playwright
Katharine Houghton (born Katharine Houghton Grant, March 10, 1945) is an American actress and playwright. She portrayed Joanna "Joey" Drayton, a white woman who brings home her black fiancé to meet her parents, in the 1967 film Guess Who's Coming to Dinner. Katharine Hepburn, who played the mother of Houghton's character in the film, was Houghton's aunt. She is also known for her role as Kanna, Katara and Sokka’s grandmother in the film The Last Airbender (2010).