Colby Day

Colby Day is an American filmmaker, screenwriter, and playwright. He was listed as one of MovieMaker Magazines "25 Screenwriters to Watch" in 2024, in collaboration with the Austin Film Festival (AFF), and the film In the Blink of an Eye, which he wrote, was the winner of the Alfred P. Sloan Feature Film Prize at the Sundance Film Festival 2026. His first feature film as a writer/director, The Comedy Hour, was announced in 2025.

Career Colby Day was born and raised in California. He graduated from the Department of Dramatic Writing at New York University's Tisch School of the Arts in 2010. His plays have been featured by several theater companies, including Crashbox Theatre Company, Pipeline Theatre Company, and The Tank, among others. He directed Appetite in 2012, which was nominated for Best Short Film at the Oldenburg International Film Festival.

Day wrote In the Blink of an Eye, which was featured on The Black List in 2016. The film, directed by Andrew Stanton features actors Rashida Jones, Kate McKinnon, and Daveed Diggs premiered at the Sundance Film Festival in 2026, where it was the winner of the Alfred P. Sloan Feature Film Prize. He also adapted the science fiction novel Children of Time by Adrian Tchaikovsky for Lionsgate.

Day wrote the screenplay for the Netflix film Spaceman (2024), directed by Johan Renck, starring Adam Sandler, Carey Mulligan, and Paul Dano, which was an adaptation of the novel Spaceman of Bohemia by Jaroslav Kalfar.

Day served as a producer of the short documentary The School of Canine Massage, directed by Emma D. Miller, which premiered at South by Southwest 2024. He is also a producer on Miller's first feature-length documentary, Father Figures.

Personal life Day is married to documentary filmmaker Emma D. Miller.

Filmography Film YearTitle Contribution Note 2011 I Don't Want to Kill Myself Writer and executive producer Feature film 2012 Appetite Director Short film 2013 Storefront Director, writer and producer Short film 2017 Happy Vacation Co-director, co-writer and co-producer Short film 2017 Perks Co-director, co-writer and producer Short film 2022 Lead/Follow Director, writer and producer Short film 2024 The School of Canine Massage Producer Short film 2024 Spaceman Writer Feature film 2026 In the Blink of an Eye Writer, executive producer Feature filmTBAFather FiguresProducer Feature filmTBAThe Comedy HourDirector, writer Feature film

Theatre Felix & The Diligence (2011) Giant Killer Slugs! (2012) The Great Molly (2014) Kitchen Sink Experiment(s) (2015)

Music videos

"Abstract Bitch" by Sam Corbin (featuring Blanche Dubwha) (2017)