My Week With Marilyn (2011) - Marilyn (Michelle Williams) white halter dress. This was the 7 year itch flashback sequence dress. "M Williams" written in pen on the inside zipper. the scene was filmed with a body double. The scene shows Marilyn Monroe standing on a subway grate and having her dress blown up by a gust of wind. It was too dangerous to film the scene with Williams herself, so a body double was used to wear the dress during this scene.