In 2017, Plummer co-starred in Oren Moverman's drama thriller film "The Dinner". The film was released on May 5, 2017 and received mixed reviews. He played the kidnapped heir John Paul Getty III in Ridley Scott's crime thriller "All the Money in the World". The film was released on December 25, 2017, and received positive reviews. The same year, Plummer portrayed the troubled teenager Charley who finds solace and purpose in his friendship with the titular racehorse in Andrew Haigh's drama "Lean on Pete". The actor felt a deep desire to play the role after connecting strongly with the story, which spurred him to send a letter to Haigh, expressing his passion for the project. The film premiered at the Venice International Film Festival where his performance received critical acclaim; he was awarded the Marcello Mastroianni Award for best emerging actor. Richard Lawson of "Vanity Fair" stated Plummer had "one of the most striking breakthrough performances of the year". The film was released on April 6, 2018, by A24.