Jensen Ackles was 42 in Batman: The Long Halloween, Part One when he played the character 'Bruce Wayne / Batman (voice)'.
That was over 3 years ago in 2021.
Today he is 46, and has starred in 13 movies in total, 2 of those since Batman: The Long Halloween, Part One was released.
In Batman: The Long Halloween, Part One, I think Jensen Ackles looks: