Atwell is a term that can refer to various subjects, but it is often associated with the British actress Hayley Atwell. She is best known for her role as Peggy Carter in the Marvel Cinematic Universe, where she first appeared in the film Captain America: The First Avenger. In addition to her work in film, Atwell has also starred in television series, including Agent Carter, which focuses on her character's adventures after World War II. Her performances have earned her critical acclaim and a dedicated fan base.