I found a cool site called Behind the Voice Actors
where you can look up the cast of nearly any animated TV show, animated movie or video game. Vocal credits are also shown for live-action movies with voice actors (like Transformers
, for instance).
Anyway... I just thought this might be neat to share. I've definitely had several "I know that voice" moments before and this site makes it easy to confirm.
as an example, Peter Cullen voiced Optimus Prime in the original G1 animated series as well as the new movies. However, I didn't know he also provided the voice for Venger (Dungeons and Dragons
(Winnie the Pooh
from the 1990s onward), Monterey Jack (Chip & Dale's Rescue Rangers
), K.A.R.R. (Knight Rider
) and a whole slew of other shows.