An haifi Valli Francesco Stephen Castelluccio, a ranar 3 ga Mayu, 1934, ɗan fari na 'ya'ya maza uku ga dangin Italiya a cikin Ward na farko na Newark, New Jersey. Mahaifinsa, Anthony Castelluccio, ya kasance mai gyaran gashi kuma mai zane-zane don Lionel model jiragen kasa; mahaifiyarsa, Mary Rinaldi, matar gida ne kuma ma'aikacin kamfanin giya. An yi wahayi zuwa gare shi ya fara aiki na waka a lokacin da yake dan shekara bakwai bayan mahaifiyarsa ta dauke shi don ganin matashi Frank Sinatra a gidan wasan kwaikwayo na Paramount a Manhattan, New York City. Daya daga cikin mawaƙa da ya fi so shi ne "Texas" Jean Valli, daga wanda ya karbi sunansa. Har sai ya iya tallafawa kansa da kiɗa, ya yi aiki a matsayin mai gyaran gashi. An kira shekarar haihuwar Valli a cikin tambaya.
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