Reclusive Diane Keaton 's chilling final hours are being laid bare by close friends and a shocking 911 recording as blindsided acquaintances of the late Annie Hall icon reveal they didn't even know she was ill.

RadarOnline.com can reveal the 79-year-old Oscar winner was surrounded by loved ones – including her adopted children, daughter Dexter, 29, and son Duke, 25 – when an emergency call was made around 8 a.m. on October 11 in a desperate but futile attempt to save her life.

A 911 dispatcher immediately sent paramedics to Keaton's California home – with audio to the Los Angeles Fire Department citing a "person down." Article continues below advertisement

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