Sebastian Stan had a part in an American miniseries.
Sebastian Stan -LRB- born August 13 , 1982 -RRB- is a Romanian-American actor , known for his role as Bucky Barnes  /  Winter Soldier in the Marvel Cinematic Universe .. Romanian-American. Romanian Americans. Bucky Barnes  /  Winter Soldier. Bucky Barnes. Marvel Cinematic Universe. Marvel Cinematic Universe. On television , Stan portrayed Carter Baizen in Gossip Girl , Prince Jack Benjamin in Kings , Jefferson in Once Upon a Time , and T.J. Hammond in the miniseries Political Animals .. Gossip Girl. Gossip Girl. Kings. Kings ( U.S. TV series ). Jefferson. Mad Hatter. Once Upon a Time. Once Upon a Time ( TV series ). Political Animals. Political Animals ( miniseries ). His role in Political Animals earned him a nomination for the Critics ' Choice Television Award for Best Supporting Actor in a Movie / Miniseries .. Political Animals. Political Animals ( miniseries ). In 2015 , he co-starred in Jonathan Demme 's Ricki and the Flash , Ridley Scott 's The Martian , and Bryan Buckley 's The Bronze .. Jonathan Demme. Jonathan Demme. Ricki and the Flash. Ricki and the Flash. Ridley Scott. Ridley Scott. The Martian. The Martian ( film ). Bryan Buckley. Bryan Buckley. The Bronze. The Bronze ( film )