贾斯廷·阿尔瓦雷斯，Mathias Alvarez was born Justin Matthew Alvarez in Miami, Florida to Matias Fernando Alvarez, a parcel courier, from Santiago, Chile and Sherri Ann Gattone, a medical receptionist, from Linwood, Pennsylvania. Mathias is of Chilean, Italian, and Scotch-Irish ancestry. He was raised in Marcus Hook, Pennsylvania and in Elkton, Maryland.