Chappaquiddick, sometimes known as The Senator, is a 2017 American political drama film directed by John Curran, and written by Taylor Allen and Andrew Logan. The film stars Jason Clarke as U.S. Senator from Massachusetts Ted Kennedy and Kate Mara as Mary Jo Kopechne, with Ed Helms, Bruce Dern, Jim Gaffigan, Clancy Brown, and Olivia Thirlby in supporting roles. The plot details the 1969 Chappaquiddick incident, in which Kennedy's negligence caused an automobile accident which resulted in the death of his 28-year-old passenger Mary Jo Kopechne trapped inside the vehicle, and the Kennedy family's response.

Principal photography began in Boston, in September 2016. The film originally premiered at the Gala Presentations section at the Toronto International Film Festival on September 10, 2017, and was released in the United States on April 6, 2018, by Entertainment Studios. It received generally positive reviews from critics, with praise for its balanced screenplay and Clarke's performance.