Mass Effect featured an all-star cast providing the voice work and its sequel will be no different. Returning actors such as Keith David and Seth Green are joined by the likes of Martin Sheen, Tricia Helfer, Carrie-Anne Moss and more.

Martin Sheen (“The West Wing”, “Apocalypse Now”) will voice the commander of the Cerberus, Illusive Man. Yvonne Strahovski (“Chuck”) plays as a genetically engineered Cerberus operative, Miranda Lawson. Also making appearances in the cast areTricia Helfer (“Battlestar Galactica”) as EDI, the voice of the new Normandy; Carrie-Anne Moss (“The Matrix”) as Aria T’Loak, the crime lord who rules the planet Omega; Shohreh Aghdashloo (“House of Saddam”) as Admiral Shala’Raan vas Tonbay; Michael Hogan (“Battlestar Galactica”) as Captain Bailey; Adam Baldwin (“Chuck”) as Kal ‘Reegar; and Michael Dorn (“Star Trek: Deep Space Nine”) as Gatatog Uvenk.

If an organization named Cerberus sounds familiar, you’ll remember bumping into them in one way or another a few times in the previous Mass Effect. As a secretive paramilitary organization dedicated to protecting human interests in the galaxy, they’ll be playing a larger role this time around.

The Mass Effect trilogy is an emotionally charged science fiction adventure set in a vast universe filled with dangerous alien life and mysterious, uncharted planets. In Mass Effect 2, players will once again step into the role of the heroic Commander Shepard, commanding their crew of some of the most dangerous operatives from across the galaxy on a mission so challenging that it’s potentially suicidal. Featuring intense shooter action, a rich futuristic storyline, space exploration and emotionally engaging character interaction, the game delivers an unparalleled cinematic experience.

Mass Effect 2 ships for Xbox 360 and PC on January 26, 2010.