premiered his directorial debut at the Cannes Film Festival on Tuesday, and the international cast were on hand to help out.TheCrazy, Stupid, Love
actor's first film behind the camera,Lost River
, starsDoctor Who actor Matt Smith and Mad Men actress Christina Hendricks.
Also starring Reda Kateb andMarvel's Agent of S.H.I.E.L.D
star Ian De Caestecker, the film has been billed as a fantasy thriller. It follows Christina's character, a single mother who is swept into a dark underworld, while her teenage son discovers a road that leads him to a secret underwater town.
Ryan's girlfriend Eva Mendes also stars in the film along with Saorise Ronan, and the two are expected to join their co-stars at Tuesday night's premiere.Eva quashed rumours that the pair had split
earlier in March when she said of the film: "Ryan really created the most beautiful, c
ollaborative, creative atmosphere on set. I know I'm biased. He's the best, he's the best."French actressMarion Cotillard
was also on the French Riviera on Tuesday for a photocall for her latest film,Two Days One Night.
Wearing a gorgeous couture dress from Maison Martin Margiela, Marion was joined by the Dardenne Brothers, the directors of the film.
The two-time Palme d'Or-winning film-makers look to be possibly heading for their third award following rave reviews from critics.Also at the annual film festival wereRosie Huntington-Whitely
and Elvis Presley's granddaughterRiley Keough
. Rosie looked chic in a pale blue cut-out Victoria Beckham dress as she helped launch Magnum's glamorous new commercial to mark the ice-cream brand's 25th anniversary.Actress Riley is best friends with Kristen Stewart
and expected to join Kristen on the red carpet this Friday as she premieresSils Maria. She
paired a low-cut white blouse with a gorgeous floral A-line midi-skirt from the Valentino Fall 2014 collection as she walked the red carpet forFoxcatcher