Hewitt is the daughter of Dr. Kenneth Hewitt, originally from Wales, and Dr. Farida Hewitt, from Pakistan. Sitara was raised primarily in Elora, Ontario. During her childhood, she spent four years on and off between the ages of 4 and 13 in Pakistan's Himalayan mountains, specifically in the Hunza Valley of Gilgit-Baltistan where her parents did their academic field research on Northern Pakistan's glaciers, valleys and small villages. Hewitt is the youngest of four siblings.
Previously, Hewitt made the transition from professional dancer to actor and performed in theatre productions like Crimes of the Heart and Second City's Tony and Tina's Wedding as Tina. Making her start as a dancer in Bollywood/Hollywood, she continued her acting training and soon landed lead roles in the independent films Fragile and Bolly Double. Hewitt also hosted TV shows for Sportsnet and TSN while studying acting in Toronto and trained with World Wrestling Entertainment in the United States