Gena Rowlands, the legendary actress known for her role as the dementia-stricken Allie in The Notebook, is now in the "full" grip of Alzheimer's disease. Her son, Nick Cassavetes, who directed the 2004 romantic drama and is himself a renowned filmmaker at 65, shared the heartbreaking health news with Entertainment Weekly during the film's 20th anniversary celebrations on Tuesday, 25 June.