BioWare had put out a partial cast list of the voice actors performing in Mass Effect 2.

The game features Emmy and Golden Globe Award-winning actor Martin Sheen, 2009 Emmy Award-winner Shohreh Aghdashloo, comedic actor Seth Green, Yvonne Strahovski, Adam Baldwin, Keith David  and sci-fi favorites Michael Dorn , Tricia Helfer , Michael Hogan ) and Carrie-Anne Moss.

Esteemed actor Martin Sheen stars as the mysterious Illusive Man who commands Cerberus, a secretive paramilitary organization dedicated to protecting human interests in the galaxy. Yvonne Strahovski plays deadly Cerberus operative Miranda Lawson, who has been genetically engineered for superior mental and physical traits. Returning to the cast from the original Mass Effect is Seth Green as Joker and Keith David as Admiral David Anderson. And rounding out the vocal roster are Tricia Helfer as EDI, the voice of the new Normandy; Carrie-Anne Moss as Aria T’Loak, the crime lord who rules the planet Omega; Shohreh Aghdashloo as Admiral Shala’Raan vas Tonbay; Michael Hogan as Captain Bailey; Adam Baldwin as Kal ‘Reegar; and Michael Dorn as Gatatog Uvenk.

Mass Effect 2 will be available on the Xbox 360 and PC on January 26, 2010 in North America and January 29, 2010 in Europe.

My question to you is, do celebrity voices truly add to the experience. All through Uncharted 2 I swore Drake’s voice was done by Firefly star Nathan Fillion, but it wasn’t (it was Nolan North) and I found it slightly distracting. He did do HALO 3: ODST though (along with the seemingly ageless Adam Baldwin - above - who was in Full Metal Jacket if you remember).