Actor
- Cloudy with a Chance of Meatballs (2009) .... Sam Sparks (voice)
- 2009 MTV Movie Awards (2009) .... Herself
- Observe and Report (2009) .... Brandi
- The House Bunny (2008) .... Shelley Darlingson
- 2008 MTV Movie Awards (2008) .... Herself
- Smiley Face (2008) .... Jane F.
- Reinventando Hollywood (2008) .... Herself
- Kids in America (2008) .... Wendy Franklin
- Frequently Asked Questions About Time Travel (2008) ....
- The Spleenectomy (2008) .... Danielle / Dr. Fields
- The Girls Next Door House Bunnies (2008) .... Herself
- Mama's Boy (2007) .... Nora Flannigan
- Entourage The Young and the Stoned (2007) .... Herself
- My Super Ex-Girlfriend (2006) .... Hannah Lewis
- Scary Movie 4 (2006) .... Cindy
- Brokeback Mountain (2005) .... Lashawn Malone
- Just Friends (2005) .... Samantha James
- 3 & 3 (2005) .... Jane Conelly
- Waiting... (2005) .... Serena
- Southern Belles (2005) .... Belle Scott
- Blue Skies (2005) .... Sarah
- Spelling Bee (2004) .... Jane Connelly
- F·r·i·e·n·d·s The Last One: Part 1 (2004) .... Erica
- F·r·i·e·n·d·s The One with Rachel's Going Away Party (2004) .... Erica
- F·r·i·e·n·d·s The Last One: Part 2 (2004) .... Erica (credit only)
- Friends The One Where Joey Speaks French (2004) .... Erica
- King of the Hill Phish and Wildlife (2004) .... Stoned Hippie Chick / Teen Girl Hippie (voice)
- Scary Movie 3 (2003) .... Cindy Campbell
- Lost in Translation (2003) .... Kelly
- May (2003) .... Polly
- Winter Break (2003) .... Justine
- Friends The One with the Birth Mother (2003) .... Erica
- The Hot Chick (2002) .... April
- King of the Hill Fun with Jane and Jane (2002) .... Lisa (voice)
- Scary Movie 2 (2001) .... Cindy Campbell
- Scary Movie (2000) .... Cindy Campbell
- Lovers Lane (1999) .... Jannelle Bay
- Skanks (1999) .... Dawn
- Eden (1998) .... Dithy
- Deception: A Mother's Secret (1991) .... Liz
- The House Bunny (2008) .... executive producer