Martin Henderson (born 8 October 1974) is a New Zealand actor. He is known for his roles on the American medical drama series Off the Map as Dr. Ben Keeton (2011), the medical drama series Grey's Anatomy as Dr. Nathan Riggs (2015–2017), the Netflix romantic drama Virgin River as Jack Sheridan (2019–present), and for his performance as Noah Clay in the 2002 horror film The Ring, while remaining known in his home country for his teenage role as Stuart Neilson in the soap opera Shortland Street (1992–1995).

Early life
Henderson was born in Auckland, and began acting at the age of thirteen, appearing in Strangers, a local television production. He attended Birkenhead Primary Northcote Intermediate and Westlake Boys High schools. He turned down going to study at university when he was 17, in favour of acting.