• Alice in Wonderland (2010) .... The White Queen
  
• "The Simpsons" .... Jenny (1 episode, 2009)
       - The Good, the Sad and the Drugly (2009) TV episode (voice) .... Jenny
• Bride Wars (2009) .... Emma
  
• Passengers (2008) .... Claire Summers
• Rachel Getting Married (2008) .... Kym
• Get Smart's Bruce and Lloyd Out of Control (2008) (uncredited) .... Agent 99
• Get Smart (2008) .... Agent 99
• Becoming Jane (2007) .... Jane Austen
• The Devil Wears Prada (2006) .... Andy Sachs
• Brokeback Mountain (2005) .... Lureen Newsome
• Havoc (2005) .... Allison Lang
• Hoodwinked! (2005) (voice) .... Red
• The Princess Diaries 2: Royal Engagement (2004) .... Mia Thermopolis
• Ella Enchanted (2004) .... Ella
• Nicholas Nickleby (2002) .... Madeline Bray
• Neko no ongaeshi (2002) (voice: English version) .... Haru
  ... aka The Cat Returns (International: English title)
• The Other Side of Heaven (2001) .... Jean Sabin
• The Princess Diaries (2001) .... Mia Thermopolis
• "Get Real" .... Meghan Green (13 episodes, 1999-2000)
      
  

Soundtrack

• Hoodwinked! (2005) (performer: "Great Big World")
• Ella Enchanted (2004) (performer: "Somebody to Love")