Tara Strong was 38 in Batman: The Dark Knight Returns, Part 1 when she played the character 'Michelle / Young Bruce Wayne / Kevin Ridley / Anchor Trish / Additional Voices (voice)'.
That was over 12 years ago in 2012.
Today she is 51, and has starred in 194 movies in total, 96 of those since Batman: The Dark Knight Returns, Part 1 was released.
In Batman: The Dark Knight Returns, Part 1, I think Tara Strong looks: