Emma Watson

Actress Emma Watson walks between buildings following commencement services on the campus of Brown University, Sunday, May 25, 2014, in Providence, R.I.

Actress Emma Watson, left, is accompanied by a woman wearing a badge and visible handgun as she walks on campus following commencement services at Brown University in Providence, R.I., on May 25, 2014.

This March 26, 2014 file photo shows actress Emma Watson at the premiere of "Noah," in New York. Watson, most known for her role as Hermione Granger in the "Harry Potter" franchise, is graduating from Brown University, an Ivy League school in Providence, R.I., on May 25.

Emma Watson arrives at ELLE's 19th Annual Women In Hollywood celebration at the Four Seasons Hotel in Beverly Hills, Calif. (Oct. 15, 2012)

Emma Watson is Glamour's October cover girl.

Emma Watson arrives at the MTV Movie Awards. (June 3, 2012)

Actress Emma Watson attends "Struck By Lightning" Premiere during the 2012 Tribeca Film Festival at the Borough of Manhattan Community College in Manhattan. (April 21, 2012)

British actress Emma Watson arrives for the UK Premiere of "My Week With Marilyn" at a central London cinema. (Nov. 20, 2011)

In this film publicity image released by The Weinstein Company, Emma Watson is shown in a scene from "My Week with Marilyn."

Actress Emma Watson attends the premiere of her new movie, "Harry Potter And The Deathly Hallows: Part 2," at Avery Fisher Hall at Lincoln Center in Manhattan. The British star wore a silk duchess Bottega Veneta evening gown to the event and dramatic eye makeup but kept the rest simple, including minimal jewelry. (July 11, 2011)

Actress Emma Watson attends the premiere of "Harry Potter and the Deathly Hallows - Part 1" at Alice Tully Hall in Manhattan. Watson wore a custom Calvin Klein Collection silk halter with black anklet sandals, also by Calvin Klein. (Nov. 15, 2010)

British actors Daniel Radcliffe, Emma Watson and Rupert Grint, from left, arrive at a cinema in London's Leicester Square for the world premiere of "Harry Potter and the Deathly Hallows Part 1." (Nov. 11, 2010)

(L-R) Daniel Radcliffe, Emma Watson and Rupert Grint attend the Harry Potter And The Deathly Hallows: Part 1 World film premiere at Odeon Leicester Square in London, England. (Nov. 11, 2010)

Emma Watson poses for photographers as she arrives to attend the World Premiere of her new film 'Harry Potter And The Deathly Hallows: Part One' in Leicester Square, central London on November 11, 2010. The stars of Harry Potter hit the red carpet in London Thursday for the world premiere of the first of two films resolving the boy wizard's adventures, after a decade in the roles that made their fortunes. Thousands of fans gathered in Leicester Square ahead of the event hoping for a glimpse of Daniel Radcliffe, 21, Emma Watson, 20, and Rupert Grint, 22, who play Harry and his best friends Hermione and Ron in all eight films. AFP PHOTO / BEN STANSALL (Photo credit should read BEN STANSALL/AFP/Getty Images)

LONDON, ENGLAND - NOVEMBER 11: Actress Emma Watson attends the Harry Potter And The Deathly Hallows: Part 1 World film premiere at Odeon Leicester Square on November 11, 2010 in London, England. (Photo by Gareth Cattermole/Getty Images)

British actress Emma Watson arrives at a cinema in London's Leicester Square for the world premiere of "Harry Potter and the Deathly Hallows Part 1." (Nov. 11, 2010)

Daniel Radcliffe (L), Emma Watson, (C) and Rupert Grint pose for photographers as they arrive to attend the World Premiere of their latest film 'Harry Potter And The Deathly Hallows: Part One' in Leicester Square, central London on November 11, 2010. The stars of Harry Potter hit the red carpet in London Thursday for the world premiere of the first of two films resolving the boy wizard's adventures, after a decade in the roles that made their fortunes. Thousands of fans gathered in Leicester Square ahead of the event hoping for a glimpse of Daniel Radcliffe, 21, Emma Watson, 20, and Rupert Grint, 22, who play Harry and his best friends Hermione and Ron in all eight films. AFP PHOTO / MAX NASH (Photo credit should read MAX NASH/AFP/Getty Images)

British actress Emma Watson arrives at a cinema in London's Leicester Square for the World Premiere of Harry Potter and the Deathly Hallows Part 1, as masked actors stand behind, Thursday, Nov. 11, 2010. (AP Photo/Joel Ryan)

British actress Emma Watson signs autographs, on her arrival for the World Premiere of Harry Potter and The Deathly Hallows: Part One, in London, Thursday Nov. 11, 2010. (AP Photo/Ian West, PA) ** UNITED KINGDOM OUT NO SALES NO ARCHIVE **

LONDON, ENGLAND - NOVEMBER 11: Actress Emma Watson attends the Harry Potter And The Deathly Hallows: Part 1 World film premiere at Odeon Leicester Square on November 11, 2010 in London, England. (Photo by Gareth Cattermole/Getty Images)

(L-r) DANIEL RADCLIFFE as Harry Potter, RUPERT GRINT as Ron Weasley and EMMA WATSON as Hermione Granger in Warner Bros. Pictures� fantasy adventure �Harry Potter and the Deathly Hallows � Part 1." ( Warner Bros. ) ltc

Actress Emma Watson attends the Costume Institute Gala Benefit to celebrate the opening of the "American Woman: Fashioning a National Identity" exhibition at The Metropolitan Museum of Art on May 3, 2010, in Manhattan.

Emma Watson attends the London show "Rooms" cocktail party at Pulinos in Manhattan. (March 25, 2010)