Mazur was born in
Los Angeles, California, the daughter of a former fashion model mother and
Ruby Mazur, an
illustrator who has worked in the
record industry and at one time was the manager of
Billy Joel. Mazur has four siblings: Nicholas, Cezanne, Matisse and Miro. Her cousin is
Epic Mazur, co-frontman of the
Hollywood-based band
Crazy Town. Mazur is of
Jewish ancestry on her father's side.
In the summer of 2005, Mazur gave birth to son Preston Daniel de Rakoff, her first child with husband Alex de Rakoff, whom she married in
April 2005. She previously dated actor
Adrien Brody, Ashton Kutcher, and guitarist
Dave Navarro.