The ceremony was marked by Marlon Brando 's boycott of the Oscars, and his sending of Sacheen Littlefeather to explain why he could not show up to collect his Best Actor award for The Godfather; and by Charlie Chaplin 's only competitive Oscar win, for Best Original Dramatic Score for his 20-year-old film Limelight, which was eligible because it did not screen in Los Angeles until 1972. Prior to this ceremony, Chaplin had received 2 Academy Honorary Awards: in 1972 for his lifetime of work; and in 1929 (after having revoked his nominations for Best Director, Actor, and Writing (Original), thereby presenting him with a special award celebrating his multifaceted achievements).