Grainne McDermott was born in September 1993. She is an actress, known for The Uncanny (2023), I Know You're in There (2016) and 12 Dog Days Till Christmas (2014).

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LOS ANGELES, CALIFORNIA - JULY 08: Grainne McDermott attends the Los Angeles premiere of Fear Street Part 2: 1978 on July 08, 2021 in Los Angeles, California. on July 08, 2021 in Los Angeles, California. (Photo by Amy Sussman/Getty Images for Netflix)

Vincent Giovagnoli and Grainne McDermott in 12 Dog Days Till Christmas (2014)

Grainne McDermott in I Know You're in There (2016)

Reginald VelJohnson, Vincent Giovagnoli, and Grainne McDermott in 12 Dog Days Till Christmas (2014)

LOS ANGELES, CALIFORNIA - FEBRUARY 10: Grainne McDermott attends the Los Angeles Screening of Amazon Prime's "I Want You Back" at SmogShoppe on February 10, 2022 in Los Angeles, California.

Grainne McDermott

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