Sarah Paulson found a friend for life in Diane Keaton.
The Emmy-winning actress, 51, shared an emotional tribute to the late actress in an Instagram post on Monday, Jan. 5, which would have marked Keaton's 80th birthday.
Keaton, the Oscar-winning actress, filmmaker and author best known for her role as Kay Adams-Corleone in "The Godfather" franchise, died on Oct. 11 at age 79 after a bout of pneumonia.
A copy of Keaton's death certificate, obtained by USA TODAY, revealed her "immediate" cause of death was primary bacterial pneumonia. A few days had passed between the onset of her illness and her death at a Santa Monica hospital.
"You would have been 80 today," Paulson wrote alongside a photo that appeared to show the actresses' silhouettes while the pair enjoyed the outdoors. "Too many deep feelings to put here…"
