"Rob said he was in the Hamptons, and he saw her, and he said, 'It's top secret, but Emily Blunt's playing Mary Poppins', and she went, 'Oh, wonderful!' I felt like I wanted to cry. It was lovely to get her stamp of approval. That took the edge off it, for sure." Emily Blunt was thrilled to hear director Rob Marshall had spoken to the original Mary Poppins, Julie Andrews, after landing the role in the sequel.