Report Details How Woody Allen Feels About Diane Keaton's Death

Iconic filmmaker Woody Allen is reportedly reeling over the sudden death of his former girlfriend and acting contemporary Diane Keaton.

Keaton died Saturday at the age of 79. While no cause of death has been provided, the legendary actress' health reportedly "declined very suddenly” over the last several months.

Allen, 89, and Keaton became romantically involved after he cast her in his 1968 Broadway play Play it Again, Sam. While their relationship did not last, their creative partnership did, with Keaton starring alongside Allen in 1977's Annie Hall and later appearing in Allen films such as Interiors (1978), Manhattan (1979) and Manhattan Murder Mystery (1993).

According to a new report from PEOPLE, Allen has been profoundly affected by Keaton's death.

"He is extremely distraught and surprised and upset," the PEOPLE source said, adding that her passing has made Allen "think of his own mortality."

Keaton stood by Allen despite allegations

Allen and Keaton "remained friends" over the last several decades, according to PEOPLE, and that bond withstood harrowing allegations made by his adopted daughter Dylan Farrow.

In 1992, actress Mia Farrow, Allen's then-girlfriend and Dylan's mother, accused the acclaimed director of molesting the young girl. The allegations resurfaced in 2018 during the height of the #MeToo movement.

At that time, Keaton publicly defended Allen on X/Twitter.

"Woody Allen is my friend and I continue to believe him," Keaton wrote. "It might be of interest to take a look at the 60 Minute interview from 1992 and see what you think."

Allen also had Keaton's back

Allen spoke glowingly of his former partner on numerous occasions, including at the 45th Annual AFI Life Achievement Award ceremony in 2017.

Allen introduced Keaton at the event, calling her "astonishing" and " a woman who is great at everything she does."

“The minute I met her, she was a great, great inspiration to me,” Allen told the crowd. “Much of what I’ve accomplished in my life I owe, for sure, to her. Seeing life through her eyes."