Phillips began modeling at the age of thirteen, appearing on the covers of Interview and Vogue Italia and in one of Calvin Klein's more controversial ad campaigns. Emancipated from her parents at fourteen, Phillips lived on her own in New York City. That same year, Phillips attended the Sierra Tucson rehab center in Arizona—not because she was actually addicted to drugs, she claims, but to get out of trouble for running up a large credit card bill in her father's name.
Phillips has been in a relationship with That '70s Show actor Danny Masterson since 2004.
Later film appearances include Octane, What We Do Is Secret, and Hostel: Part II, for which she was nominated for Scream Queen in the 2007 Scream Awards. Her most recent starring roles are in Dark Streets and an as-yet-unreleased remake of It's Alive. She also has an uncredited cameo in the as-yet-unreleased Rosencrantz and Guildenstern are Undead.
| Year | Title | Role |
|---|---|---|
| 1997 | Sublime : "Wrong Way" (music video) | Annie |
| 1999 | Sugar Town | Autograph Girl |
| Black and White | Charlie | |
| 2000 | Almost Famous | Estrella Starr |
| 2001 | Fast Sofa | Tracy |
| Tart | Delilah Milford | |
| Bully | Ali Willis (also wardrobe) | |
| 2003 | Octane | Backpacker |
| 2004 | The Door in the Floor | Alice |
| Grand Theft Auto: San Andreas (VG) | Helena Wankstein (voice) | |
| 2005 | Pancho's Pizza | ? |
| Havoc | Emily | |
| Venom | Tammy | |
| The Outsider | Herself | |
| 2006 | Friendly Fire | Herself |
| CSI: Crime Scene Investigation (1 episode, Kiss-Kiss, Bye-Bye) | Li'l' Cherry | |
| Totally Awesome | Karelynn (uncredited) | |
| 2007 | You Are Here | Aubrey |
| The Wizard of Gore | Maggie | |
| Hostel: Part II | Whitney | |
| What We Do Is Secret | Lorna Doom | |
| 2008 | Chelsea on the Rocks | Herself |
| Choke | Ursula | |
| Dark Streets | Crystal | |
| unreleased | The Bridge to Nowhere | Jasper |
| Made for Each Other | Marcy | |
| The Heart Is a Drum Machine | Herself | |
| Wake | Carys | |
| It's Alive | ? |