The late Diane Keaton chose an unconventional path to parenthood when she adopted her children well into her 50s - and was candid about the reason behind her decision. "I didn't think that I was ever going to be prepared to be a mother," Keaton - who died at the age of 79 on Saturday, October 11 - previously told Ladies' Home Journal. "Motherhood was not an urge I couldn't resist. It was more like a thought I'd been thinking for a very long time. So I plunged in." Keaton welcomed daughter Dexter, 29, and son Duke, 25, via adoption and as a single mom in her 50s.