Keram Malicki-Sánchez auditioned for the role of Peter.
Sam Claflin auditioned for the role of Henry and screen tested with Amanda Seyfried before Max Irons was cast.
Taylor Lautner was considered for the role of Peter.
According to the trailer, the story is set in the 1300s. No date is given in the film itself.
Shipped to theaters under the code name "Fangs of Affection".
The character named Peter is from the Russian musical composition and children's story "Peter and the Wolf" written by Sergei Prokofiev in 1936.
The novelization by Sarah Blakley-Cartwright is based on the shooting script rather than the finished film. This is the reason that the novel diverges noticeably from the film.
With the exception of Valerie (Amanda Seyfried), all the characters from Daggerhorn are either played by actors with brown eyes or wearing brown contact lenses. Most notable of the latter is Julie Christie, who plays Valerie's Grandmother, who is famous for her blue eyes.