Jahanara was an ardent partisan of her brother, Dara Shikoh, and supported him as her father's chosen successor. During the war of succession which took place after Shah Jahan's illness in 1657, Jahanara sided with the heir-apparent Dara and ultimately joined her father in Agra Fort, where he had been placed under house arrest by Aurangzeb. A devoted daughter, she took care of Shah Jahan till his death in 1666. Later, Jahanara reconciled with Aurangzeb who gave her the title "Empress of Princesses" and replaced her younger sister, Princess Roshanara Begum, as the First Lady. Jahanara died unmarried during Aurangzeb's reign.