Diane Keaton’s health reportedly ‘declined very suddenly’ in the months before she died.

The Oscar-winning actress’ death at the age of 79 was announced on Saturday and while no details have been released about the cause of death, insiders have now said it was ‘unexpected’.

A source told People magazine: ‘She declined very suddenly, which was heartbreaking for everyone who loved her.

‘It was so unexpected, especially for someone with such strength and spirit.

‘In her final months, she was surrounded only by her closest family, who chose to keep things very private. Even longtime friends weren’t fully aware of what was happening.’

In March, Diane put her ‘dream home’ in Brentwood, California, up for sale, despite previously vowing to stay there forever, and she was no longer regularly

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