Nastassia was born in Toronto, Ontario. She's the daughter of filmmaker Andrzej Markiewicz (Dreams Beyond Memory). She began acting at a young age in her father's projects.
Aside from being an actress, Nastassia dabbles in all kinds of art forms, including: drawing, painting, writing, music, clothing design and artistic makeup. She studied Fashion Design at George Brown College in Toronto and is a certified Makeup Artist.
