Fox Searchlight's upcoming Margot Robbie film Goodbye Christopher Robin — not to be confused with Disney's Christopher Robin live-action movie with Ewan McGregor — is based on the real-life story of how Winnie the Pooh was created thanks to a little boy's teddy bear. A short trailer came out just a few months ago, but now Fox Searchlight has revealed a full-length feature trailer that gives us a solid idea of what to expect from the movie — and it looks like we might shed a tear or two. Watch it below:

While we wait for Winnie the Pooh to return to the silver screen in Christopher Robin, we can watch the intriguing tale of how legendary author A. A. Milne (Domhnall Gleeson) created the Winnie the Pooh character during the World War I era. Along with the brand-new trailer, Fox Searchlight revealed the official synopsis:

GOODBYE CHRISTOPHER ROBIN gives a rare glimpse into the relationship between beloved children’s author A. A. Milne (Domhnall Gleeson) and his son Christopher Robin (Will Tilston), whose toys inspired the magical world of Winnie the Pooh. Along with his mother Daphne (Margot Robbie), and his nanny Olive (Kelly Macdonald), Christopher Robin and his family are swept up in the international success of the books; the enchanting tales bringing hope and comfort to England after the First World War. But with the eyes of the world on Christopher Robin, what will the cost be to the family?

Both Gleeson and Robbie are fantastic talents, so this movie looks incredibly promising. Also, we can already tell that young actor Will Tilston will deliver a sweet and charming performance that will capture the hearts of the audience. Goodbye Christopher Robin appears to be a small yet heartwarming film that puts the spotlight on a story never told on-screen before. For that reason alone, I believe we should all be anticipating its release.

Goodbye Christopher Robin, directed by Simon Curtis (Woman in Gold, My Week with Marilyn), opens in theaters in the U.S. on October 13, 2017.