Martin Henderson (born October 8, 1974) is a New Zealand actor.

Henderson was born in Auckland, New Zealand. He began acting when he was thirteen years old, appearing in Strangers, a local television production. He attended Westlake Boys High School and Birkenhead Primary. He starred in the drama Shortland Street, where he played the character of "Stuart Neilson" from 1992 to 1995. He subsequently appeared in a number of Australian films and television productions (such as Echo Point and Home & Away), before moving to the United States in 1997, in order to pursue a career in Hollywood films and to train in a two-year program at the Neighborhood Playhouse in New York City.

Henderson spent more than a year unsuccessfully auditioning for film roles in Los Angeles, but in 2001, he was finally cast in a supporting role in the John Woo-directed war film, Windtalkers. In 2002, he starred opposite actress Naomi Watts in the horror film, The Ring. Following the box office success of the film, Henderson received a role playing the character of Drew in Perfect Opposites , and subsequently was cast as the lead character in the biker film, Torque, released in early 2004 to mixed reviews. In 2005, he starred opposite Indian actress Aishwarya Rai in the romantic film Bride & Prejudice, and in the award-winning Little Fish starring Cate Blanchett.

Henderson has also appeared alongside Britney Spears in the music video for her single, Toxic. He is set to star, along side Jordana Brewster, in the television series adapted from the 2005 movie Mr. & Mrs. Smith. Recently, Henderson has appeared in a commercial for the 2008 Cadillac CTS.

Martin Henderson first became a star in his home land, New Zealand, when he starred in the series, Shortland Street, in the early to mid 90s. He then moved to Australia to star in the shortlived soapie, Echo Point, and Sweat, which also starred a very young Heath Ledger. The pair became friends, and Martin convinced Heath to move to Sydney and make a go of his career, and the two lived together. Martin also worked on Home and Away, and Big Sky, as well as getting an AFI Award nomination for his supporting role in the Aussie film Kick. Martin left Australia to study acting and theatre in New York, where he also looked up Heath in LA, who he says has looked after him. Martin now resides in LA also, and is really starting to make his mark.