James Han Mattson is an American actor, writer, and producer. He is best known for his roles in the films The Social Network, The Dark Knight Rises, and The Avengers. He has also appeared in television shows such as The Office, House of Cards, and The Good Wife. Mattson has won numerous awards for his work, including a Golden Globe Award for Best Supporting Actor for his role in The Social Network. He is also a two-time Emmy Award nominee for his work on House of Cards. Mattson is an advocate for social justice and has been involved in numerous charitable causes. He is a passionate supporter of the arts and has been involved in various theater and film projects. Mattson is an inspiration to many and continues to be a leader in the entertainment industry.