From Bioware Base:

Back in March, we offered fans an opportunity to Take Their Place in Dragon Age: Inquisition by voicing a character in Thedas. We received more than 2,000 entries, and after many hours and many tough decisions, we came up with two winners: Steven Kelly and Rosie Bucknell.

We flew Rosemary and Steven to our London studio, where they worked with our talented voiceover producer Caroline Livingstone and met Inquisition actors Alix Wilton Regan, Ramon Tikaram, Indira Varma, and Miranda Raison.

After two action-packed days, we successfully stole their voices with our advanced recording technology, forever encoding them in a series of zeroes and ones. Keep your ears open, because come November 18th, you'll be able to meet them in the game.