Sebastian Stan is a Romanian–American actor. He gained recognition for his role as Bucky Barnes / Winter Soldier in the Marvel Cinematic Universe media franchise beginning with the film Captain America: The First Avenger (2011), and including the Disney+ miniseries The Falcon and the Winter Soldier (2021).

Romanian Americans are Americans who have Romanian ancestry. According to the 2017 American Community Survey, 478,278 Americans indicated Romanian as their first or second ancestry, however other sources provide higher estimates, which are most likely more accurate, for the numbers of Romanian Americans in the contemporary United States; for example, the Romanian-American Network supplies a rough estimate of 1.2 million who are fully or partially of Romanian ethnicity. There is also a significant number of people of Romanian Jewish ancestry, estimated at about 225,000.