Here are 5 things we know about Dr Gurpreet Kaur:
Gurpreet Kaur is 32 years old. Ms Kaur's family is from Pehowa in Kurukshetra district. Her father, Inderjit Singh, is a farmer. Her mother Mata Raj Kaur is a homemaker.
She has two sisters who stay abroad. Sources close to Mr Mann said their families have been associated for years.
Her uncle, Gurinder Jeet, tells NDTV that Gurpreet always excelled at studies. One of her neighbour in Pehowa, Vaneeta Behl, told reporters that Ms Kaur is a kind-hearted, caring and a very intelligent young woman.
She studied at the Maharishi Markandeshwar Medical College in Haryana's Maulana, where she was a gold medallist, says her uncle.
Sources say that Ms Kaur also helped Bhagwant Mann during his campaign for the Punjab assembly elections.