Blueprint Pictures and StudioCanal are teaming up to bring Matt Haig's beloved novel to the big screen, according to Collider. The adaptation of one of the most widely read fantasy novels of the past decade is officially in development — and the casting conversation is wide open.
Why This Adaptation Has Fancasters Buzzing
For a book this emotionally rich and narratively complex, casting is everything. The story hinges on two central performances: Nora Seed, a woman standing at the crossroads of every life she could have lived, and Mrs. Elm, the enigmatic librarian who guides her through infinite possibilities. Get those two right, and you have the foundation for something genuinely special. Get them wrong, and the whole emotional architecture collapses.
Beyond the leads, the novel is packed with supporting characters who represent roads not taken — versions of Nora's life that require actors capable of making each alternate world feel fully real in just a handful of scenes. That's a casting puzzle with dozens of moving pieces, which makes it exactly the kind of project the myCast community lives for. The book's global fanbase spans continents and demographics, which means the dream cast debate is going to get loud.
What myCast Fans Are Already Saying
Here's the good news: myCast fans didn't wait for the official greenlight. Across three fan-cast stories already live on the platform, the community has been staking out their picks — and some clear frontrunners have emerged.
In the most active story, The Midnight Library, fans have cast 27 roles with 193 total votes, and the data tells a compelling story. Mary Elizabeth Winstead is the overwhelming fan favorite for Nora Seed with 49 votes — a choice that makes a lot of sense when you think about it. Winstead has a quiet intensity and emotional range that could carry Nora's grief and wonder simultaneously. Keira Knightley has also been nominated for the role, though with 2 votes she's very much the underdog in this race.
For Mrs. Elm — the Midnight Librarian herself — Emma Thompson is dominating across multiple fan casts. She pulls 46 votes in the main story and an additional vote in , where also earns a nomination for Nora. A throws out some fascinating alternatives for the librarian role, with fans nominating both and — two choices that would each bring something completely different to the character.