We had to find a way for her to sing about loss to the children in ways that they can comprehend, and the song doesn’t actually speak of their mother until the final verse, until she feels like they’re really getting it, and then to get to hear Emily (Blunt) sing it, I mean, she would come to our apartment where we have a studio.
It was just magical to hear her do it.
The song came from one of the books, Mary’s uncle is the man in the moon, and she takes the children there for a tea party, but on the other side of the moon, he tells her, this is where the things that people can’t find live — on the dark side of the moon…
Emily Blunt - The Place Where Lost Things Go (From "Mary Poppins Returns"/Official Audio)