Oh man, February is so close I can taste it! Atlus USA has started the Persona 5 western hype train be releasing the list of voice actors for the English version of the game.
That is the list for the main cast of characters, however that doesn't take into account some of the other characters we will be meeting in the game as well such as some of the Social Link characters.
Also from now, leading up to the release of the game, Atlus USA will be releasing character trailers for Persona 5 and they have started with a trailer for the Protagonist and a video introducing Xander Mobus, the voice actor for the Protagonist in Persona 5. Xander Mobus is probably mostly known for being the announcer Super Smash Bros 4.
Persons 5 releases in the US and Europe on February 14th for PS3 and PS4.