The cast for Robert Rodriguez's Sin City: A Dame to Kill For continues to fill out rather nicely.  In a recent interview at Sundance, the sequel's co-director confirmed Bruce Willis' return and spoke on a number of other casting decisions, such as the part of Ava Lord which is still vacant at this time.  Willis played eternally tough cop Hartigan in the 2005 original and will presumably return in the role.  Rodriguez also spoke about the use of 3D in the sequel.

Starring Joseph Gordon-Levitt, Josh Brolin, Mickey Rourke, Christopher Melonni, Jessica Alba, Rosario Dawson, Jaime King, Dennis Haysbert and Jamie Chung, Sin City: A Dame to Kill For opens October 4th.  Hit the jump to watch the interview with Rodriguez. 

You can check out the full interview with Rodriguez, who also comments further on Gordon-Levitt's new addition (via MTV) with quotes following the video:

With specifics as to casting, the director commented as follows:

[Juno Temple] just shot, she was fantastic. Her and Ray Liotta played together, they were amazing. Jeremy Piven shot just last night… we were shooting last night, all night. There are some characters from the book. It might surprise people who they play and the turns that they do… Bruce [Willis] is back, so you’ll be seeing him…

We have some choices in mind [for Ava Lord but] we haven’t finalised the casting. She doesn’t shoot for a couple weeks.

He also addressed the fact that the sequel was shot in 3D:

We shot this in 3D. We didn’t shoot Sin City in 3D. I wouldn’t want to convert that one probably. The difference in shooting it is just… you can’t even compare.

Because this is a very two dimensional world it’s very stylised. To see that kind of stylisation in 3D will blow people’s mind.