The Stone family is readying for a reunion. Thomas Bezucha, who wrote and directed the 2005 dramedy “ The Family Stone ,” is working on a sequel to the contemporary holiday classic. He told CNN that he had already been thinking about revisiting the fictional kin before the death of Diane Keaton , who died in October at the age of 79 . Keaton’s character, the Stone family’s matriarch Sybil, dies after a terminal illness at the end of the original film. 'Snowfall' Spinoff Ordered to Series at FX “