Remember yesterday? It was awesome! BioWare revealed that a bunch of awesome celebs would be in Mass Effect 2! Martin Sheen, Yvonne Strahovski, Tricia Helfer, they're all in there, talking about intergalactic politics and other really interesting and not at all boring stuff. At the time, however, that's all we knew, and it was up to blind speculation to find out who was going to play what. Today, all questions are answered, and the video above does the talking. They're really filling out the cast here, and I can't wait to hear Helfer's sexy voice coming out of the Normandy. If Seth Green interrupts it I'm going to freak out and slash my disk with a box cutter. I'm hardcore like that, and she has that effect on me. I mean, she's Tricia Helfer. She is. I checked.

For those who missed it, the full press release is below.

BioWare Announces Celebrity Cast for Mass Effect 2 – The First Blockbuster of 2010

Star-Studded Cast Includes Martin Sheen, Seth Green, Yvonne Strahovski, and More

EDMONTON, Alberta--(BUSINESS WIRE)--BioWare™, a division of Electronic Arts Inc. (NASDAQ:ERTS), today revealed the voice actors performing in Mass Effect 2, the second act of the award-winning science fiction trilogy. The game features Emmy and Golden Globe Award-winning actor Martin Sheen (“The West Wing”, “Apocalypse Now”), 2009 Emmy Award-winner Shohreh Aghdashloo (“House of Saddam”), comedic actor Seth Green (“Austin Powers”), “Chuck” stars Yvonne Strahovski and Adam Baldwin, Keith David (“Crash”) and sci-fi favorites Michael Dorn (“Star Trek: Deep Space Nine”), Tricia Helfer (“Battlestar Galactica”), Michael Hogan (“Battlestar Galactica”) and Carrie-Anne Moss (“The Matrix”).

“Emotionally engaging narrative is a key design pillar for BioWare, and the top-notch voice talent in Mass Effect 2 helps drive this goal,” said Dr. Ray Muzyka, co-founder, BioWare and Group General Manager of the RPG/MMO Group of EA. “Credible, powerful personalities are vital to delivering a compelling story experience in BioWare’s games, and we have assembled an amazing ensemble cast that surpasses the very high bar set in the original Mass Effect!”

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.

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 will be available on the Xbox 360® videogame and entertainment system and PC on January 26, 2010 in North America and January 29, 2010 in Europe. Follow us on Twitter: http://twitter.com/masseffect2. For more information on Mass Effect 2, go to http://masseffect.bioware.com/.