I can't post links, so just copy and paste this "Todd Howard and Fallout 4 team talk more details (Voice Actors!)" into Youtube.
Be sure to read the description as the guy who recorded and uploaded the video states that his phone battery ran out so he had to write down key pieces of information. My favourite bit of info being: "The voice actors briefly mentioned that there will be about 8 different types of character personalities based on dialog (good guy, cocky, evil, selfish, etc)"