Matthew John Armstrong (born August 28, 1973) is an American actor that played Phoenix Elias Finch in Season 6's episode Frontierland.
Armstrong is known for his recurring role as Ted Sprague in NBC's Heroes.
Armstrong has appeared in series like House, CSI: Miami, The Mentalist, Bones, Private Practice and Numb3rs.
Armstrong is the husband of fellow Heroes cast member Ashley Crow, who portrayed Celia in the season 9 episode "Alex Annie Alexis Ann".