Jennifer Carpenter was 37 in Batman: Gotham by Gaslight when she played the character 'Selina Kyle (voice)'.
That was over 6 years ago in 2018.
Today she is 44, and has starred in 24 movies in total, 4 of those since Batman: Gotham by Gaslight was released.
In Batman: Gotham by Gaslight, I think Jennifer Carpenter looks: