Harshdeep was born in a sikh family in Delhi and inherited music from her father, Savinder Singh, who owns a factory of musical instruments. Apart from studying, she started learning music at the tender age of six. She learnt Indian Classical Music from Shri Tejpal Singh, popularly known as the Singh Brothers, and Western Classical Music from George Pullinkala, Delhi Music Theatre. Later, at the age of twelve, in order to explore the world of music, she joined the Delhi School of Music to learn piano.