Actress Kate Bosworth poses at the premiere of "The 11th Hour" at the Arclight theatre in Hollywood, California, August 8, 2007. The documentary movie explores the state of the global environment and the possible solutions for restoring the planet's ecosystems. The movie opens in New York and Los Angeles on August 17. REUTERS/Mario Anzuoni (UNITED STATES)

Cast member Sandra Bullock attends the premiere of the movie "All About Steve" at the Mann Chinese theatre in Hollywood, California August 26, 2009. The movie opens in the U.S. on September 4. REUTERS/Mario Anzuoni (UNITED STATES ENTERTAINMENT HEADSHOT)

Actor Leonardo DiCaprio arrives for a gala screening of "The 11th Hour" at the 60th Cannes Film Festival May 19, 2007. REUTERS/Yves Herman (FRANCE)

Presenter and musician Miley Cyrus, dressed in Valentino, arrives at the 80th annual Academy Awards, the Oscars, in Hollywood February 24, 2008. REUTERS/Lucas Jackson (UNITED STATES-OSCARS)

Cast member Renee Zellweger poses at the premiere of "Leatherheads" at the Grauman's Chinese theatre in Hollywood, California, March 31, 2008. The movie opens in the U.S. on April 4. REUTERS/Mario Anzuoni (UNITED STATES)

Actor Orlando Bloom attends a fund raiser by Global Green USA in San Francisco, California December 12, 2006. Global Green USA promotes green design ideas in architecture, interior design, clothing and food. REUTERS/Kimberly White (UNITED STATES)

Cast member Demi Moore listens to a question at a news conference for the movie "Bobby" during the 31st Toronto International Film Festival in Toronto September 14, 2006. The festival runs from September 7 until September 16. REUTERS/Mario Anzuoni (CANADA)

Actress Gwyneth Paltrow arrives for the West Coast premiere of the documentary "Valentino: The Last Emperor" at the Los Angeles County Museum of Art (LACMA) in Los Angeles April 1, 2009. REUTERS/Mario Anzuoni (UNITED STATES ENTERTAINMENT HEADSHOT FASHION)

Actress Meryl Streep poses on the red carpet at the Rome film festival in Rome October 22, 2009. REUTERS/Alessia Pierdomenico (ITALY ENTERTAINMENT)

Actress Lindsay Lohan arrives at Sir Richard Branson and Eve Branson's Rock the Kasbah Gala to benefit Virgin Unite and the Eve Branson Foundation at Vibiana in Los Angeles, October 26, 2009. REUTERS/Danny Moloshok (UNITED STATES ENTERTAINMENT HEADSHOT)

Actor David Duchovny arrives at the 21st annual Producers Guild of America Awards in Los Angeles January 24, 2010. REUTERS/Danny Moloshok (UNITED STATES - Tags: ENTERTAINMENT HEADSHOT)

Cast member Dustin Hoffman attends a news conference for the movie "Stranger Than Fiction" at the 31st Toronto International Film Festival in Toronto September 9, 2006. The festival runs from September 7-16. REUTERS/Mario Anzuoni (CANADA)

Actress Calista Flockhart attends the Jules Verne Adventure Film Festival at the Shrine auditorium in Los Angeles October 6, 2006. The annual two-week Jules Verne Adventure Film Festival will relocate from Paris to Los Angeles in 2007. REUTERS/Mario Anzuoni (UNITED STATES)

Actor Adrian Grenier attends the premiere of "The 11th Hour" at the Arclight theatre in Hollywood, California, August 8, 2007. The documentary movie explores the state of the global environment and the possible solutions for restoring the planet's ecosystems. The movie opens in New York and Los Angeles on August 17. REUTERS/Mario Anzuoni (UNITED STATES)

Actress Anna Faris, the star and executive producer of the comedy film "The House Bunny", poses at the film's premiere in Los Angeles August 20, 2008. REUTERS/Fred Prouser (UNITED STATES)