He played James "Bucky" Barnes/The Winter Soldier in the 2011 film Captain America: The First Avenger, based on the Marvel Comics character. Stan reprised the role in the 2014 sequel Captain America: The Winter Soldier and Ant-Man, and in the 2016 sequel Captain America: Civil War, and will reprise his role in Avengers: Infinity War.
- Stan was originally shortlisted for the role of Captain America in Captain America: The First Avenger, but at the end, Chris Evans was cast instead. However, Stan ended up portraying James "Bucky" Burnes/The Winter Soldier in its sequel Captain America: The Winter Soldier and many subsequent Marvel Cinematic Universe's installments.
- Sebastian Stan was uncredited for his cameo in the post-credit scene in Ant-Man.