Photo by Matt Carr, Getty ImagesKat Dennings poses for a portrait during the 34th Annual Toronto Film Festival - 09/12/2009

Photo by Matt Carr, Getty ImagesKat Dennings poses for a portrait during the 34th Annual Toronto Film Festival - 09/12/2009

Photo by Todd Williamson, WireImageJimmy Bennett, Kat Dennings and Jake Short at the Los Angeles premiere of Shorts - 08/15/2009

Photo by Todd Williamson, WireImageKat Dennings at the Hollywood premiere of Adventureland - 03/16/2009

Photo by Kevin Winter, Getty ImagesNikki Reed, Kristen Stewart and Kat Dennings at the Hollywood premiere of Adventureland - 03/16/2009

Photo by Gregg DeGuire, WireImageKat Dennings at the 12th Annual Hollywood Film Festival Awards Gala in Beverly Hills - 10/27/2008

Photo by Eric Charbonneau, WireImageKat Dennings at the Los Angeles Premiere of The House Bunny - 08/20/2008

Photo by Eric Charbonneau, WireImageKat Dennings at the Los Angeles Premiere of The House Bunny - 08/20/2008

Photo by Jason Merritt, Film MagicKat Dennings at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Jordan Strauss, WireImageKat Dennings, screenwriter Lorene Scafaria, Ari Graynor and Alexis Dziena at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Jordan Strauss, WireImageKat Dennings at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Jordan Strauss, WireImageKat Dennings at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Jordan Strauss, WireImageMichael Cera and Kat Dennings at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Jordan Strauss, WireImageAri Graynor and Kat Dennings at the Los Angeles premiere of Nick and Norah's Infinite Playlist - 10/02/2008

Photo by Matt Simmons, WireImageKat Dennings at the Toronto Film Festival Premiere of Nick and Norah's Infinite Playlist - 09/06/2008

Photo by Matt Simmons, WireImageKat Dennings and Michael Cera at the Toronto Film Festival Premiere of Nick and Norah's Infinite Playlist - 09/06/2008

Photo by Matt Carr, Getty ImagesKat Dennings at the Toronto Film Festival Portrait Session for Nick and Norah's Infinite Playlist - 09/05/2008

Photo by Jeff Vespa, WireImageKat Dennings and Michael Cera at the Toronto Film Festival Portrait Session for Nick and Norah's Infinite Playlist - 09/05/2008

Photo by Jeff Vespa, WireImageKat Dennings and Michael Cera at the Toronto Film Festival Portrait Session for Nick and Norah's Infinite Playlist - 09/05/2008

Photo by Frederick M. Brown, Getty ImagesKat Dennings at the 15th annual Women In Hollywood Tribute - 10/06/2008

Photo by John Shearer, WireImageKat Dennings at the 15th annual Women In Hollywood Tribute - 10/06/2008

Photo by Alexandra Wyman, WireImageKat Dennings at the Los Angeles Film Festival screening for - 06/25/2007

Photo by Hal Horowitz, WireImageKat Dennings at the 6th Annual Tribeca Film Festival premiere of - 05/01/2007

Photo by Jeffrey Mayer, WireImageKat Dennings arrives to Variety's Power of Youth Benefiting St. Jude - 10/06/2007

Photo by Chris Polk, WireImageKat Dennings arrives to Variety's Power of Youth Benefiting St. Jude - 10/06/2007

Photo by Jordan Strauss, WireImageKat Dennings during the Diamond Information Center and InStyle Diamond Fashion Show Preview Luncheon - 01/10/2008

Photo by John Sciulli, WireImageKat Dennings at the Glamour Magazine Golden Globe Suite - 01/15/2006

Photo by Gregg DeGuire, WireImageKat Dennings at the 11th Annual Critics' Choice Awards - 01/09/2006

Photo by Todd Williamson, WireImageKat Dennings at the Los Angeles premiere of Shorts - 08/15/2009

Photo by Michael Tran, Film MagicKat Dennings at the Los Angeles premiere of Shorts - 08/15/2009