Sebastian Stan, a Romanian-born American actor, has carved out an illustrious career in Hollywood with his versatile acting prowess and charismatic on-screen presence. Born on August 13, 1982, in Constanta, Romania, Stan moved to the United States at the age of 12 and developed an interest in acting while attending Rockland Country Day School. His passion for performing arts led him to study at Rutgers University's Mason Gross School of the Arts, which included a year abroad studying acting at Shakespeare's Globe Theatre in London. Stan's breakthrough came in 2009 when he was cast as Bucky Barnes, also known as The Winter Soldier, in the Marvel Cinematic Universe. His portrayal of the complex anti-hero, first introduced in Captain America: The First Avenger (2011), has been lauded for its depth and intensity. Stan's character arc, from Steve Rogers's loyal best friend to a brainwashed assassin and finally a redeemed hero, showcased his range as an actor and solidified his status as a fan favorite. However, Stan's repertoire extends beyond the world of comic book adaptations. He has demonstrated his versatility through various roles in both film and television. Some notable performances include his role as Carter Baizen in Gossip Girl, Jefferson in Once Upon a Time, and T.J. Hammond in Political Animals, the latter earning him a Critics' Choice Television Award nomination for Best Supporting Actor in a Movie/Miniseries. In the film industry, he has graced screens in diverse roles such as Tonya Harding's abusive husband in I, Tonya (2017) and astronaut Dr. Chris Beck in The Martian (2015). With each role, Stan continues to captivate audiences and critics alike with his dynamic performances.