Why should you care about Cannes?

Cannes opened with Nicole Kidman playing Grace Kelly in Olivier Dahan's already controversial "Grace of Monaco". Click through the gallery to see what else to watch out for.

Cannes veteran Sophia Loren will be the guest of honor in the Classics section of this year's festival. She will present her son's short film "La voce umana". Loren also appears in the film speaking in Neapolitan dialect, her first film appearance since 2009.

Tommy Lee Jones has directed himself, Hilary Swank and Meryl Streep in his first directorial venture since 2005. Last time Jones was in the director's chair he scooped up the Cannes Best Actor award for his western "The Three Burials of Melquiades Estrada".

Ryan Gosling will make his directorial debut at this year's festival with "Lost River." The film, which will be shown in the Un Certain Regard section, stars his girlfriend Eva Mendes alongside Christina Hendricks, Saoirse Ronan and Matt Smith. It was shot in Detroit and sees Christina Hendrinks play "a single mother swept into a dark underworld, while her teenage son discovers a road that leads him to a secret underwater town."

Film buffs are betting on this crime saga to be a strong contender for the Palme d'Or. Semi-factual film "Foxcatcher", directed by Bennett Miller, documents insane millionaire John du Pont's obsession with Olympic wrestling, and his relationship with gold medal winning brothers, played by Channing Tatum and Mark Ruffalo.

Award winning New Zealand screen writer Jane Campion, the only female director to win the Palme d'Or, presides over this year's jury which includes Leila Hatami, Willem Dafoe and Sofia Coppola.

Cannes attendees looking for a little respite from the white knuckle ride of thrillers such as Atom Egoyan's "The Captive", should watch out for Céline Sciamma's coming-of-age drama "Girlhood". The film follows Marieme, a high schooler who changes everything about her to be accepted by a new clique.

For the film aficionados who really know their stuff, this is an exceptional treat. Turkish director Nuri Bilge Ceylan is well known for his thought-provoking melodramas and this year his three hour 16 minute film "Winter Sleep" has been tipped as a favorite for the Palme d'Or. Ceylan is no stranger to Cannes acclaim having won the Grand Prix twice, as well as the Best Director award.

Mike Leigh has finally made the film he has been dreaming about for decades. The incredibly expensive and ambitious film "Mr.Turner" is a biopic of eccentric British painter J.M.W. Turner (played by Timothy Spall) and follows him as he experiences the death of his esteemed father. This is Leigh's first foray into historical storytelling, and many will be waiting to see if he pulls it off.

Legendary director Jean-Luc Godard will bring "Farewell to Language" to Cannes this year to compete for the Palme d'Or. The film stars Héloise Godet, Zoé Bruneau and Kamel Abdeli and was shot in 3D. Another thing to look forward to is that he has promised to attend the festival this year, unlike last time he had a film at Cannes.

• Film critic Agnes Poirier: The Cannes Film Festival is the Olympics of cinema


• It was created as a reaction against Italian dictator Mussolini promoting fascist-Italian films


• Poirier: At Cannes directors are free to throw tantrums and tell critics what they really think


• Today success at Cannes is the Nobel Prize directors and actors secretly covet, says Poirier

Editor's note: Agnes Poirier is a London-based French journalist and political analyst who contributes regularly to newspapers, magazines and TV in the UK, U.S., France and Italy. She is also a film critic and an independent adviser to the Cannes film festival on British films. Follow @AgnesCPoirier on Twitter.

(CNN) -- The Cannes Film festival, which kicked off Wednesday on the French Riviera, is an Olympics of cinema, where endurance matters as much as victory to the 30,000 industry insiders who attend each year.

The festival was conceived in the late 1930s as a reaction against Italian dictator Benito Mussolini promoting fascist-Italian and national-socialist German films at the Venice Film Festival. Its first edition, planned in September 1939, was delayed by war till 1946 but its ideals remained the same: to show films from all over the world without prejudice of any sort.

But today Cannes jostles in the crowded film industry schedules with other A-list events: Toronto (and Venice) act as Fall launchpads for the following year's awards season, while Sundance is at the vanguard of independent cinema and new talent. Meanwhile the Oscars are considered by many as the supreme accolade of the movie business.

Cannes still regards itself as the grande dame of film events the world over -- but does it still matter?

The Cannes Film Festival is an apolitical no man's land

Jean Cocteau, first Cannes president and poet

The festival, which this year celebrates its 67th edition, stands firmly apart -- and, some would argue, above -- the rest of the crowd.

This comes in part from its original ambition, as put by the festival's first president, poet Jean Cocteau: "The Cannes Film Festival is an apolitical no man's land, a microcosm of what the world would be like if people could make direct contact with one another and speak the same language."

For Cannes is to cinema what the motto "liberte, egalite, fraternite" ("liberty, egality, fraternity") is to France: an aspiration, an ideal, an inclusive forum for all talents, old and new, coming from all over the world, and motivated by one common love: films. Without prejudices.

In its early years Cannes was nothing more than a social event where stars mingled on the red carpet. Everyone smiled for the camera and everyone went home happy as almost every film received some kind of an award.

Then, Cannes raised its game. First came the Palme d'Or, its top award, given in 1955 and rivaling the Oscars as the most prestigious prize in the film industry. In 1972, the festival declared its independence by setting up its own selection committee: until then, each country had chosen the films which would represent them at Cannes, as still happens with the Oscars' best foreign film category.

The selection of features became more discerning, the awards became fewer in number -- and success at the festival became ever more elusive.

The mix of glamor and high art, frivolity and seriousness combine to make Cannes a temple to cinema like no other.

Agnes Poirier, film critic

But if the Cannes glamor of the 1950s and 1960s lingers still, the festival's reputation for passion and controversy has only increased. The entertainment industry is notorious for controlling its sometimes unruly talents, with PR agencies operating like war machines and publicity a matter of life and death at the box office.

In contrast Cannes is a unique place for unleashing imagination and wildness. The mix of glamor and high art, frivolity and seriousness combine to make Cannes a temple to cinema like no other.

For Cannes is where directors will throw tantrums and tell critics to go to hell in no uncertain terms; where the winner of the Palme d'Or can be booed, as happened to film-maker Maurice Pialat in 1987 when he collected the coveted prize for "Under the Sun;" and where a talent like Danish maverick Lars Von Trier can express sympathy at a press conference for Adolf Hitler, then apologize, then be kicked out of the festival by the organizers (he later withdrew his apology).

It is also an event which has always embraced the times. In 1968, while students in Paris were rioting and building barricades, the enfants terribles of the French New Wave -- including François Truffaut and Jean-Luc Godard -- canceled the awards ceremony and turned the festival into a giant marketplace.

In 2004, Michael Moore's "Fahrenheit 9/11" -- which criticized U.S. foreign policy -- became the first documentary to win the Palme d'Or from a festival jury which numbered more Americans than French.

For directors and actors, success at Cannes is the Nobel Prize that they secretly covet. And for the 2,500 or so film critics -- who for 12 days start watching their first film at 8am and their last one just after midnight -- it is the most frantic and rewarding time, when masterpieces are seen for the first time and talents speak freely.

Q. Can art really get any more expensive? A. 'We will see a billion dollar work'

Can any train ride match the Orient Express for glamor and sheer romance?

Scrap metal find turns out to be $33 million Faberge golden egg