Tara Strong was 42 in Batman: The Killing Joke when she played the character 'Barbara Gordon / Batgirl (voice)'.
That was over 8 years ago in 2016.
Today she is 51, and has starred in 194 movies in total, 62 of those since Batman: The Killing Joke was released.
In Batman: The Killing Joke, I think Tara Strong looks: