Eugene Anthony Chaplin (born August 23, 1953) is a Swiss recording engineer and documentary filmmaker. He is the fifth child of Oona O'Neill and Charlie Chaplin, the grandson of playwright Eugene O'Neill, and the father of Kiera Chaplin.
He is the president of the International Comedy Film Festival of Vevey, Switzerland. He directed the documentary film Charlie Chaplin: A Family Tribute produced by Jarl Ale de Basseville and created the musical "Smile", which is a narration of Charlie Chaplin's life through his music.
As a recording engineer, he worked with The Rolling Stones, David Bowie, and Queen.