Here comes the sun

Ever wonder why one of the symbols for movie stars is a pair of sunglasses?

Brad Pitt, seen here at the May 24, 2011, premiere of his movie "The Tree of Life," shows you why. Keep clicking for more proof!

Jessica Chastain

Brad Pitt's "The Tree of Life" co-star Jessica Chastain donned sunglasses for a photocall during the 64th Annual Cannes Film Festival on May 16, 2011, in France.

Sunglasses are a trademark with actor Johnny Depp, seen here at the photocall of "Pirates of the Caribbean: On Stranger Tides" at the 64th Cannes Film Festival on May 14, 2011.

Salma Hayek

Mexican actress Salma Hayek gets ready before an interview as part of the promotion of the film "Puss in Boots" during the 64th Cannes Film Festival on May 11, 2011, in Cannes.

Sylvester Stallone

Actor Sylvester Stallone adjusts his sunglasses as he poses during a photo call prior to the premiere of his latest film "The Expendables" on Aug. 6, 2010, in Berlin.

Bold shades and an angora cardigan accentuated Uma Thurman's movie star appeal while inside the Cannes jury press conference, on May 11, 2011.

Pictures: 2011 Cannes Film Festival
Pictures: amfAR gala at Cannes

Jude Law

Actor Jude Law proves that even a tuxedo isn't too formal for sunglasses as he arrives for a premiere during the 2011 Cannes Film Festival

Jodie Foster

Actress Jodie Foster arrives at the premiere of "'Pirates of the Caribbean: On Stranger Tides" held at Disneyland on May 7, 2011, in Anaheim, Calif.

Lady Gaga

Of course, singer Lady Gaga has to put her own spin on everything, even sunglasses. Here, she wears heart-shaped lenses on the set of Canal Plus TV show "Le grand journal" during the 64th Cannes Film Festival on May 11, 2011.

Meg Ryan

Actress Meg Ryan attends the 2011 New Orleans Jazz & Heritage Festival - Day 3 presented by Shell at the Fair Grounds Race Course on May 1, 2011, in New Orleans. Round granny glasses have been her trademark for decades.

Chris Rock

Actor Chris Rock attends "Grown Ups" photo call at Maricel Hotel on July 29, 2010, in Palma de Mallorca, Spain.

Taylor Momsen

Taylor Momsen poses for photographers at the Material Girl clothing line launch at Macy's Herald Square on Aug. 3, 2010, in New York.

David Spade

Actor David Spade attends "Grown Ups" photo call at Maricel Hotel on July 29, 2010, in Palma de Mallorca, Spain.

George Clooney

Actor George Clooney arrives for the "Burn After Reading" photocall during the 65th Venice Film Festival at Palazzo del Casino on Aug. 27, 2008, in Venice, Italy.

Kevin James

Actor Kevin James attends the Spanish premiere of "Grown Ups" at Maricel Hotel on July 28, 2010, in Palma de Mallorca, Spain.

Mickey Rourke

Mickey Rourke, a cast member in "The Expendables," takes off his sunglasses for photographers at the premiere of the film in Los Angeles, Tuesday, Aug. 3, 2010.

Adam Sandler

Actor Adam Sandler attends "Grown Ups" photo call at Maricel Hotel on July 29, 2010, in Palma de Mallorca, Spain.

Kid Rock

Singer Kid Rock protects his eyes from the early morning sun as he performs in Bryant Park on ABC's "Good Morning America" on Friday, Aug. 22, 2008, in New York.

Eric Roberts

Actor Eric Roberts arrives at "A Black and White Gala for Barack Obama...America's Next President," in Beverly Hills, Calif., Thursday, Aug. 21, 2008.

Rapper LL Cool J

Forget the sun -- what about those hot studio lights? Rapper LL Cool J makes an appearance on BET's "106 & Park" show, celebrating their 2,000th episode on Tuesday, Aug. 19, 2008, in New York.

Ice Cube

Ice Cube, a cast member in "The Longshots," tips his sunglasses to photographers as he arrives at the premiere of the film in Los Angeles, Wednesday, Aug. 20, 2008.

Jesse Metcalfe

Actor Jesse Metcalfe hits a drive at the 9th Annual Celebrity Golf Classic hosted by Oscar De La Hoya at Lakeside Golf Club in Burbank, Calif., Monday, Aug. 18, 2008.

Will.I.Am

Is he or isn't he? Musician Will.I.Am arrives at the National Council of La Raza ALMA Awards in Pasadena, Calif. on Sunday, Aug. 17, 2008.

Tom Cruise

Even in sunglasses, there's no hiding when you're Tom Cruise. Here the actor poses for photos before the New York Jets - Washington Redskins NFL preseason football game on Aug. 16, 2008, at Giants Stadium in East Rutherford, N.J.

Princess Caroline of Hanover

Photo by Pascal Le Segretain/Getty Images

Even royalty look famous in sunglasses. Princess Caroline of Hanover attends the 44th Concours International de Bouquets at Casino de Monte-Carlo on May 7, 2011.

Prince Charles and Camilla, Duchess of Cornwall

Britain's Prince Charles and his spouse, Camilla , Duchess of Cornwall, wear shades April 5, 2011, on a visit to the Oudayas Kasbah, a fortified neighborhood of Rabat on the coast of Morocco.

Anne Archer

Actress Anne Archer arrives for the "Tribute to Isaac Hayes" service at Hope Presbyterian Church Monday, Aug. 18, 2008, in Cordova, Tenn., near Memphis, Tenn.

Priscilla Presley

Actress Priscilla Presley attends the TCM Classic Film Festival Opening Night Gala in Los Angeles on April 28, 2011.

Matthew McConaughey

Actor Matthew McConaughey wore a shirt and shades to the premiere of "Tropic Thunder" in Los Angeles on Monday, Aug. 11, 2008.

Forest Whitaker

Oscar-winning actor Forest Whitaker, left, and his wife, model Keisha Whitaker, pose on the press line at the premiere of the animated feature film "Star Wars: The Clone Wars" in Los Angeles on Sunday, Aug. 10, 2008.

Luke Wilson

Luke Wilson, who plays the title role in "Henry Poole is Here," waves to onlookers at the premiere of the film in Los Angeles, Thursday, Aug. 7, 2008.

Actress Rita Wilson arrives to the Geffen Playhouse's Annual "Backstage at the Geffen" Gala on May 2, 2011, in Los Angeles.

Paris Hilton

Paris Hilton arrives at a hotel in Copenhagen, Denmark, with Benji Madden in tow, Monday, Aug. 4, 2008. Hilton was promoting her new line of baskets and bags at Fashion Week.

Actor Rob Lowe poses during the 2011 Cannes Film Festival on France's Mediterranean coast.

Madonna

Madonna waves to fans as she arrives for the screening of her documentary film "I Am Because We Are" at the Traverse City Film Festival, Saturday, Aug. 2, 2008, in Traverse City, Mich.

Kanye West

A cool looking Kanye West, right, is followed by photographers as he arrives at the premiere of the film "Pineapple Express" in Los Angeles, Thursday, July 31, 2008.

Audrina Patridge

Televison personality Audrina Patridge arrives to celebrate her birthday at the Wet Republic pool at the MGM Grand Hotel/Casino on May 14, 2011, in Las Vegas.

Jim Carrey

Actress Jenny McCarthy laughs at a comment made by her then boyfriend Jim Carrey at the premiere of the film "Pineapple Express" in Los Angeles, Thursday, July 31, 2008.

Joaquin Phoenix

In his "career" as a rapper, which later turned out to be a hoax, actor Joaquin Phoenix has turned large, dark-rimmed sunglasses into a signature that has been copied and mocked in recent months.

Kevin Costner

Actor Kevin Costner looks over his glasses as he measures his putt during the first round of the AT&T Pebble Beach National Pro-Am golf tournament at the Poppy Hills course in Pebble Beach, Calif., Thursday, Feb. 7, 2008.

Halle Berry

Joe Scarnici/Getty Images for Grey Goose

Halle Berry attends the Halle Berry celebrity golf classic with Grey Goose at Wilshire Country Club on April 18, 2011 in Los Angeles.

Kate Hudson and Kurt Russell

Actress Kate Hudson and actor Kurt Russell are both wearing sunglasses on the field before the Super Bowl XLII football game between the New England Patriots and New York Giants at University of Phoenix Stadium on Feb. 3, 2008, in Glendale, Ariz.

Victoria Beckham

Soccer player David Beckham and his wife, former Spice Girl Victoria Beckhamarrive at Ciampino airport in Rome.