Pierce Gagnon is an American child actor best known for his television roles as Logan Evans in One Tree Hill and as Ethan Woods - the Woods' "son", who is a humanoid robot and the prototype for the Humanichs Project - in the mystery thriller science fiction series Extant.
Gagnon is also known for his breakout role as Cid in the feature film Looper, opposite Bruce Willis, Joseph Gordon-Levitt and Emily Blunt.
In 2013, Gagnon shot three back-to-back features. In the first of the three, Merry Friggin' Christmas, he stars alongside Robin Williams, Lauren Graham, Joel McHale, Wendy McClendon Covey and Oliver Platt.
Gagnon then went right into shooting the Zach Braff film Wish I Was Here, which premiered at Sundance. Two months later he filmed a role in the feature Tomorrowland with George Clooney and Judy Greer.
Gagnon was born in Atlanta, Georgia.