Family
- mother Sharon Murphy: Irish American and Eastern European descent; divorced Brittany's father when she was a baby
- father Angelo Bertolotti: an Italian American racketeering criminal; has had little contact with her father since her parents divorced
Companions
- Companion Jeff Kwatinetz: began dating in spring of 2003; engaged in January 2004; called off engagement May 2004, bringing their 13-month relationship to an end
- Companion Ashton Kutcher: met while filming "Just Married"; began dating in October 2002; split in April 2003
- Ashton Kutcher: romantically linked in October 2002
- Companion Joe Macaluso: met while working on the film, "Little Black Book"; engaged Christmas 2005; called of engagement August 2006
- husband Simon Monjack: secretly wed at their home in Los Angeles, May 2007
