Sebastian Stan was born on August 13, 1982, in Constanta, Romania. He moved with his mother to Vienna, Austria, when he was eight, and then to New York when he was 12. Stan studied at Rutgers Mason Gross School of the Arts and spent a year at Shakespeare's Globe Theatre in London.

When he went back to New York he started working in some projects like Law & Order (1990), Tony 'n' Tina's Wedding (2004), and Red Doors (2005). Upon finishing college, he played Martin Waters in The Architect (2006), Chase Collins in The Covenant (2006), and worked in Eric Bogosian's theater play "The Talk" (2007). Also in 2007, Stan started playing Carter Baizen in Gossip Girl (2007). His following projects were Spread (2009), Kings (2009), Hot Tub Time Machine (2010), and Black Swan (2010). He also landed the role of Bucky Barnes in Captain America: The First Avenger (2011). In 2012, Stan worked in several projects: Gone (2012), Political Animals (2012), The Apparition (2012), Once Upon a Time (2011), and the mini series Labyrinth (2012). In 2013, he was in Broadway's Picnic, and in 2014 he was introduced as The Winter Soldier in the Marvel Cinematic Universe in Captain America: The Winter Soldier (2014). He has continued his role as Bucky Barnes/The Winter Soldier in Captain America: Civil War (2016), Black Panther (2018), and Avengers: Infinity War (2018). Other notable projects include Ricki and the Flash (2015), The Martian (2015), The Bronze (2015), and Logan Lucky (2017). He was given high praise for his work in the recent I, Tonya (2017).