In February 2016, Atwell was cast in the ABC series "Conviction". The series aired 13 episodes between October 2016 and January 2017; in May 2017, ABC announced it had been cancelled. Atwell starred as Margaret Schlegel in BBC One's 2017–2018 miniseries, "Howards End", based on the classic E.M. Forster novel and adapted by playwright Kenneth Lonergan. In 2018, she played Evelyn Robin, the wife of the titular character in Disney's live action Winnie-the-Pooh film "Christopher Robin" directed by Marc Forster and co-starring with Ewan McGregor.