The 46-year-old starred in Sex and the City with Davis, also 46, and said she's thrilled to hear that she's adopted a little girl called Gemma Rose.
She said to Access Hollywood: 'It's a wonderful situation. I know she's wanted to have a family for a long time and she deserves that unique kind of happiness that children bring and I'm so happy for her.'
Davis's character Charlotte adopted a little girl called Rose in the first movie adaptation of their hit TV show and Parker said she couldn't help but notice how she gave her daughter Rose as a middle name.
She said: 'That occurred to me. But it's a beautiful old-fashioned name, and Kristin is a really old fashioned girl.
'She's a southern-raised kind of... She has a real traditional streak, so I think it's a beautiful name... It's nice.'