However, the 47-year-old businesswoman and environmentalist wouldn't go as far to say anything nice about her second husband to the Guardian, mostly because she simply had nothing nice to say.
"Considering what went on, the one thing I'm most proud of is I never lowered myself to the level that some parents do where they speak badly about the other parent and it's made my child a very healthy, very happy, very open person," Mills said of her daughter, "which she would have been whatever happened in her life because that's who she is genetically."
Mills married McCartney in 2002 "for love," divorcing six years later. Their daughter, Beatrice, was born in 2003.
"Beatrice says she's 99 percent me," Mills told the British news outlet. "I don't know if that's a good thing. I think she's got the best of both of us, we're both very musical."
Mills revealed that she teaches her daughter the saxophone "because her father can't read music," but admits she received her natural poetry skills from her father. "I think she's got the best of both of us," she repeated.