You can actually improvise a lot as a voice actor. It's not that entirely different than shooting a live action movie; the characters mouths are quite easy to manipulate once all the information is built into the computer. So you can improvise a lot and it doesn't matter really how far along they are in the process they can really just make the character say something different.
Seth RogenI know most people don't like their jobs very much and don't get a lot of personal satisfaction from their jobs. That's something that I really do get a lot of.
Seth RogenWe [with Judd Apatow] started talking about ideas and he said, 'Well, I'm going to do this movie Knocked Up with Seth [Rogen], but after that you guys should do a movie together.' I read it and thought that it was very funny.
Seth Rogen