Banerjee was born in 1973 in Rheydt, Mönchengladbach, North Rhine-Westfalia, West Germany[1][2] to a German mother and an Indian father.
Banerjee studied philosophy, German, and Indology in Bonn, later political science and public law.
[2] During her studies she gained her first journalistic experience as a student assistant in the capital studios of Westdeutscher Rundfunk (WDR) and RTL.
From 2008 to 2011, Banerjee worked as a speaker for the ZDF editors-in-chief Nikolaus Brender and Peter Frey.
[1] In 2015, Banerjee received the Heinrich Mörtl Foundation's media prize for the promotion of training and further education for police officers in the state of Hesse for the report Drogenmetropole Frankfurt – Der lange Weg gegen die Sucht (drug metropolis Frankfurt – The long way against the addiction).