 This film launched the Rock and Roll era by using "Rock Around the  Clock" by Bill Haley and the Comets (qv) as its theme music. The  song was chosen for the theme after it was heard among records owned  by Peter Ford (I) (qv), the son of the films star,  Glenn Ford (qv). For years it was thought the producers daughter  had discovered the song, but this has since been proven incorrect.  "Rock Around the Clock" went to No. 1 around the world and  eventually sold an estimated 25 million copies.