Born in Amritsar, Dhillon won the Indian junior title in the discus in 2010 and the national youth title in 2011. She made her international debut at the 2011 World Youth Championships in Athletics, competing in qualifying only, and won her first medal (a bronze) at the 2011 Commonwealth Youth Games. Dhillon won a shot put/discus double at the 2012 Indian Junior Championships and claimed a silver medal at the 2012 Asian Junior Athletics Championships behind Subenrat Insaeng.