Sonja Bennett was born in Vancouver, British Columbia, Canada on August 24, 1980. She is the daughter of director/writer Guy Bennett and Anna Hart. She was raised mainly by her mother in different areas. She is a graduate of Garibaldi Secondary School in Maple Ridge, British Columbia. She also attended the University of British Columbia for two years on an academic scholarship. Afterwards, she attended Langara College in Vancouver, British Columbia and enrolled in the Studio 58 program.