★ 8 
Acting
Mark Nelson
Mark Nelson is best known for Law & Order: Special Victims Unit, Castle, CSI: Crime Scene Investigation and Law & Order. Mark Nelson was born on September 26, 1955. Mark Nelson is 71 years old (born September 26, 1955).
- Born
- September 26, 1955 (71 years old)
- Place of birth
- Westwood, New Jersey, USA
Biography
Mark Nelson (born September 26, 1955) is an American actor mostly known for playing Ned in Friday the 13th (1980). He has appeared in the Broadway productions of Angels in America (2018), Cabaret (2016), After the Fall, The Invention of Love, Three Sisters, Picasso at the Lapin Agile (Obie Award), A Few Good Men, Rumors, Broadway Bound, Biloxi Blues, Brighton Beach Memoirs, and Amadeus. He teaches theater at Princeton University and HB Studio in New York, where he studied acting with Uta Hagen.
Known for
Filmography
- 2026Crystal LakeDick Wagner
- 2022JuliaDr. Greenberg
- 2011UnforgettableEugene Lustig
- 2009The Good WifeAdam Englehardt
- 2009CastleHot Shot
- 2001Law & Order: Criminal IntentMancuso
- 2000CSI: Crime Scene InvestigationAudience Member
- 2000EdSid Pennington
- 1999Law & Order: Special Victims UnitRobert Stevens
- 1999Now and Again
- 1997Liberty!Loyalist
- 1996Spin CityTherapist
- 1996Suddenly SusanPaul
- 1990Law & OrderStein
- 1988American ExperienceNathaniel Pendleton
- 1987thirtysomethingLeonard Katz
- 1982Remington SteeleLino
- 1982American PlayhouseSam the Skate
Frequently asked questions
What movies and shows has Mark Nelson been in?
Mark Nelson is best known for Law & Order: Special Victims Unit, Castle, CSI: Crime Scene Investigation and Law & Order.
When was Mark Nelson born?
Mark Nelson was born on September 26, 1955. (Westwood, New Jersey, USA)
How old is Mark Nelson?
Mark Nelson is 71 years old (born September 26, 1955).
Updated: October 25, 2026 ·