Callahan was born Gracie Elizabeth Louisa Callahan on October 4th, 1993, in Durham, Ontario, and was raised in Toronto, Ontario. Gracie started her career by landing a minor role as "Amy" on the Discovery Tv Show 'Murder U (2016)'. Following the airing of the show and after graduating from a 6-month intensive Meisner program at the Robert Mello Studio in Atlanta, Georgia, she returned home and landed a lead role on the Discovery Tv Show "Forbidden: Dying for Love (2018)" as Jennifer Hyatt. Some of her credits now include 'US Weekly's Famous Feuds (2017)' as Holly Madison, the lead role as "Pippa" in the Alumnae Theatre's New Ideas Festival of 'Mourning After The Night Before' by Chloe Whitehorn, and in the romantic comedy Christmas movie 'No Sleep 'Til Christmas (2018)' with Odette Annable, Charles Michael Davis, and Alphonso McAuley. She has since been seen having landed a principal role as "Amber" in the new thriller 'Hidden Family Secrets' along side Alex Paxton-Beesley and Sonja Smits, which is expected to air late 2021.