The import of Trevor Nunn’s hit London revival of A Little Night Music looks like it might be back on track for an unspecified opening date in December. According to Playbill, a casting notice has gone out from producers specifying that all roles are open, though it insists that dates are “tentative.” The musical was last seen in NY this past January in a gala concert for the Roundabout Theatre Company starring the late Natasha Richardson and Vanessa Redgrave. Both actresses were poised to star in the planned full-scale revival until Richardson’s tragic death last month, when the production was put on hold. No official announcement has been made, but it appears from the casting call one might not be far behind. The article lists as producers: David Babani for Chocolate Factory Productions, Andrew Fell and the Frankel, Viertel, Baruch, Routh Group.