Diane Keaton adopted both of her children when they were infants, essentially as newborns.

Ages at adoption

  • Daughter Dexter : Born December 15, 1995, and adopted by Diane in 1996 when Dexter was still a baby, only a few months old.
  • Son Duke : Born February 8, 2000, and adopted in 2001, also when he was an infant, under 2 years old.

Quick Scoop context

  • Diane Keaton became a first-time mother at around age 50 when she adopted Dexter, and she later adopted Duke in her early 50s.
  • Both adoptions are often described in coverage as her becoming a mom “in her 50s,” with both kids welcomed very early in their lives rather than as older children.

In short, when people ask “how old were Diane Keaton’s children when she adopted them” , the answer is that both Dexter and Duke were adopted as very young infants, within the first year or so after their birth.

Information gathered from public forums or data available on the internet and portrayed here.