Undertone (stylized as undertone) is a 2025 Canadian horror film written and directed by Ian Tuason, in his directorial debut. The film stars Nina Kiri as Evy, a woman who hosts a paranormal podcast with her friend Justin (Adam DiMarco), where she is the skeptic to his believer. After Evy moves back home to become the caregiver to her dying mother (Michèle Duquet), she and Justin are sent recordings by a married couple (Keana Lyn Bastidas and Jeff Yung) experiencing paranormal noises in their home, drawing Evy into fear and paranoia. Evy and her mother are the only characters to be shown on-screen in the film. All other characters are heard as off-screen voices, thus conveying the film's horror through its sound design. Undertone had premiered at the Fantasia on July 27, 2025, and was theatrically released in the United States by A24 on March 13, 2026, and by VVS Films in Canada. The film received generally positive reviews from critics, with praise for Tuason's directing, atmosphere, and Kiri's performance.