Morrison an haife shi ne a Chicago, Illinois, kuma ya girma a Arlington Heights, Illinois. Ita ce mafi tsufa na 'ya'ya uku; 'yar'uwarta, Julia, mawaki ne da mawaki da kuma likitan kiɗa, kuma dan uwanta, Daniel, shi ne darektan makarantar sakandare. Mahaifinta, David L. Morrison, malamin kiɗa ne mai ritaya da kuma darektan makarantar sakandare wanda aka kira shi Malami na Shekara ta Illinois State Board of Education a 2003.Morrison ya halarci Makarantar Sakandare ta Kudu, sannan ya sauke karatu daga Makarantar Sakandare ta Prospect (inda iyayenta suka yi aiki) a shekarar 1997. Ta kasance abokai tare da marubuci Ian Brennan. Ta kasance dan wasan clarinet na All-State a cikin ƙungiyar mawaƙa ta makaranta, ya yi waka a cikin mawaƙa, kuma ya kasance mai farin ciki a cikin ƙananan makarantar.
Jami'ar Loyola ta Chicago,