I had sort of lost track of when shooting was to officially begin on this picture, but today James Corden, who plays The Baker, tweeted this pic with the caption "First Day!":
I'm not sure if Meryl begins work right away as well, but recall in my post on July 15 that it had been reported that she was set to head to London in three weeks to start work. Three weeks would put it exactly today. Considering The Witch is going to be in quite a few scenes, I'd wager that Meryl is in the thick of things this week already. I wonder when we'll get set pics!