Jack Peter Grealishan haife shi a ranar 10 ga watan Satumba,shekara ta 1995 ƙwararren ɗan ƙwallon ƙafa ne na Ingila wanda ke taka leda a matsayin ɗan wasan gefe ko mai buga wasan tsakiya na kulob din Premier League Manchester City da ƙungiyar ƙwallon ƙafa ta Ingila . Grealish ya koma Aston Villa yana dan shekara shida, kuma ya fara buga wa kulob din wasa a watan Mayun shekarar 2014, bayan aro a Notts County . Wanda ya cancanci wakiltar Ingila ko Jamhuriyar Ireland a duniya, Jamhuriyar Ireland ta sanya Grealish har zuwa matakin ƙasa da 21 kafin ya tabbatar da shawarar sa ta bugawa Ingila wasa a watan Afrilun shekarar 2016.Ya buga wa Ingila 'yan kasa da shekaru 21 a karon farko a watan Mayu shekarar 2016, inda ya lashe Gasar Toulon ta 2016. A cikin shekarar 2021, Grealish ya bar Villa ya koma Manchester City a cikin yarjejeniyar musayar kudi fam miliyan 100,abin da ya sa ya zama dan wasan Ingilishi mafi tsada har abada. An haifi Jack Grealish a Birmingham, West Midlands kuma ya girma a Solihull kusa. Ya halarci Makarantar Firamare ta Roman Katolika da Makarantar Sakandaren Roman Katolika ta St Peter a Solihull.