Thanks to a Totally Kate contributor for the following information, which I’ve also confirmed with Kate.
Kate Mulgrew is providing the voice for Flemeth, a witch who transforms into an enormous, double-tough dragon in Dragon Age: Origins, the new fantasy RPG from Bioware, makers of Star Wars Knights of the Old Republic 1 and 2, and Mass Effect 1 and 2. You can check out Bioware’s site for more info. If you decide to pre-order from amazon.com please consider using the link below so the Totally Kate website earns a referral.
Totally Kate Webmaster
Kate Mulgrew's Official Fansite Blog 
Anyone know if this will be extended dialogue or just a word or two? Would love to know if she provided any interviews for the collectors edition.
how could i say… she is a “major secondary role”… she is not in your party so you don’t have as much lines as the main characters, but she has a quite a few very good ones, and that really do need good acting…and Kate does an exemplary, thrilling job…