AT&T girl was born in Tashkent, Uzbekistan to a Jewish family. Since her father was an engineer and her mother was a businesswoman, therefore, the whole family moved to the United States when Vayntrub was six years old. The family’s first residence after moving to the United States was San Jose, California but they, later on, moved to Los Angeles County. Vayntrub attended UCLA School of Theater Film and Television in 2007 and graduated in 2011.