Last year I posted that according to interviews given by Michelle Williams and Sarah Silverman, they both were nude in a upcoming film directed by Sarah Polley called Take This Waltz. The film premieres at the Toronto International Film Festival on September 10. Here is a excerpt from an article in the Toronto Sun that states both Williams and Silverman go full-frontal.

• In Sarah Polley’s Take This Waltz, her scenes from a tempted marriage include a long full-frontal female shower session involving stars Michelle Williams and Sarah Silverman. There are also numerous sexual situations, including threesomes;

http://www.toronto.com/article/697117--canada-uncensored

Here is another article excerpt:

Considerable female nudity and explicit sex scenes are also a departure for Polley. A colourful, romantic film studded with music, raucous joy and careful, quiet moments, all set in Toronto’s funky west-end neighbourhoods.

http://mobile.thestar.com/mobile/entertainment/article/1046189