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Jacob Daniel Tierney (born September 26, 1979) is a Canadian actor, director, screenwriter, and producer of film and television. He is the co-creator, co-writer, director, and executive producer of the Canadian sitcom Letterkenny (2016–2023), the executive producer and director of the first two seasons of its spinoff series, Shoresy (2022–2023), and the creator, writer, director and executive producer of the sports romance series Heated Rivalry (2025–present). He began his career as a child actor, most notably playing Eric in the horror anthology series Are You Afraid of the Dark? (1990–1992). He later began writing and directing, making his feature film debut with Twist (2003), followed by The Trotsky (2009), Good Neighbours (2011), and Preggoland (2014).