Supercalifragilisticexpialiocious (pronounced /ˌsuːpɚˌkælɪˌfrædʒəlˌɪstɪkˌɛkspiːˌælɪˈdoʊʃəs/) is an English word in the song with the same title in the musical film Mary Poppins. The song was written by the Sherman Brothers, and sung by Julie Andrews and Dick van Dyke.