Family
- mother Sheryl Rossum: Divorced Rossum's father when she was pregnant
- father : Divorced Rossum's mother when she was pregnant; has only met his daughter a few times
Companions
- Companion David Wildenstein: Member of the French billionaire art-dealing Wildenstein family; dated from 2004-2005
- husband Justin Siegel: Works at Interscope Records; started dating in 2007; reports surfaced after they split in August 2009, that they were married in secret two years ago and are now filing for a divorce
