Niamh McGrady (born 4 October 1982) is a film, stage and television actress from Castlewellan, County Down, Northern Ireland. She is best known for her parts as Mary-Claire Carter in Holby City and PC Danielle Ferrington in the psychological thriller The Fall.

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Born and raised in Castlewellan, County Down, she attended Assumption Grammar School, Ballynahinch, County Down. From age 18, she trained at the Royal Welsh College of Music & Drama.

After landing a role in Summer 2003 in Italy,^[3] on graduation she joined a Welsh production of Romeo and Juliet and then pantomime in Belfast,^[4] before moving to London for Northern Irish playwright Lisa McGee's production of Girls & Dolls. McGrady then featured in a production of the Shakespeare play Macbeth, starring Patrick Stewart. After a critically acclaimed run in London's West End, it then relocated to Broadway, New York City in 2008.^[3]

On return to London, she made her television début in the George Best biopic Best: His Mother's Son in 2009, but her part was eventually removed in the cutting room.^[3] Shortly afterwards she joined the cast of Holby City as a cast semi-regular, in the role of nurse Mary-Claire Carter.

After appearing in many short independent films through mainly uncredited roles, she was cast in the crime drama television series The Fall,^[3] based in Northern Ireland, alongside Gillian Anderson and Jamie Dornan. She rejoined the cast of Holby City in 2013 as a regular cast member,^[5] after which she gave-up her part-time waitressing and bar jobs.^[3] However, in early 2015, McGrady left Holby City to coincide with the departure of Jules Knight and their departure scenes aired in April 2015.^[6][7]