Ryan O'Neal's prostate cancer prognosis is reportedly ''very grim''.
The 70-year-old actor - who battled leukemia in the late 1990s - will have his symptoms treated, but insiders believe the disease may spread to his ''bones, and other areas of his body'', which could see him choose to undergo chemotherapy.
Tatum O'Neal has allegedly checked herself back into rehab.
The 48-year-old actress - who has previously battled against drug addiction - is reportedly said to have suffered a drugs relapse last month and she has voluntarily returned to a rehabilitation facility.
Redmond O'Neal has pleaded no contest to felony possession of heroin and firearms charges.
The 26-year-old son of Ryan O'Neal and late actress Farrah Fawcett had been in jail since his arrest two weeks ago, but will now enter one-year inpatient rehab treatment after answering the charges after his attorneys Richard Pintal and Michael Brewer convinced Judge Keith Schwartz not to sentence him to prison.