Natalia Dyer was only 16 years old when she filmed I Believe in Unicorns (2014), but was 19 by the time the film was first shown at a film festival.
Though they did not share any scenes together, both Natalia Dyer and Amy Seimetz played roles in the hit Netflix show Stranger Things; as Nancy Wheeler (Dyer) and Becky Ives (Seimetz)
Leah Meyerhoff claims this film was "one of the last features to shoot on Fuji 16 mm film stock."
Meyerhoff views her 2005 short film Twitch as a "precursor" to this film, which "wasn't a direct expansion of the short."
Leah Meyerhoff admits the film is "semi-autobiographical" and that she cast her real life mother, Toni, as Davina's mother before casting Natalia Dyer.