Goldie Hawn is remembering her late costar and friend, Diane Keaton. "Diane, we aren't ready to lose you," Hawn, 79, wrote via Instagram on Saturday, October 11, hours after news broke that the famed actress died in California at the age of 79. "You've left us with a trail of fairy dust, filled with particles of light and memories beyond imagination," she continued in the caption, which was shared alongside a stunning black and white photo of Keaton in one of her iconic hats and scarfs.