They've also landed Chuck's Yvonne Strahovski and Adam Baldwin. Battlestar Galactica's Michael 'Saul Tigh' Hogan and Tricia Helfer too.
Most notable is
Their top operative, Miranda Lawson, will be played by Chuck's Yvonne Strahovski. She's been "genetically engineered for superior mental and physical traits", they say.
Kal 'Reegar is to be played by fellow Chuck star Adam Baldwin, who'll never escape his Firefly role as Jayne - ever. Just like Michael Dorn shall always been known as that guy Worf, from that sci-fi show with a starship in it, and he plays Gatatog Uvenk in ME2.
Now for the Battlestar Galactica duo, Tricia Helfer and Michael Hogan, who plays as the new SSV Normandy voice and Captain Bailey respectively. Shohreh Aghdashloo from House of Saddam fills the shoes of Admiral Shala'Raan vas Tonbay.
Last but not least is Trinity from The Matrix, or Carrie-Anne Moss as she might like to be called, cast as Aria T'Loak the crime lord of Omega. Let's not forget that loveable scamp Seth Green will be back as Flight Lieutenant Jeff 'Joker' Moreau.
Keith David is also back as Captain Anderson, with a bit of a promotion to Admiral - though this may differ depending on certain choices you made in Mass Effect.
"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!" said BioWare's Dr. Ray Muzyka, reports . Mass Effect 2 is out on Xbox 360 and PC January 29th.