(From L) US actor Matthew McConaughey, British actress Naomi Watts and US writer and producer Chris Sparling pose as they arrive for the screening of the film "The Sea of Trees" at the 68th Cannes Film Festival in Cannes, southeastern France, on May 16, 2015. AFP PHOTO / ANNE-CHRISTINE POUJOULAT

US director Gus Van Sant (L) and British actress Naomi Watts arrive for the screening of the film "The Sea of Trees" at the 68th Cannes Film Festival in Cannes, southeastern France, on May 16, 2015. AFP PHOTO / ANNE-CHRISTINE POUJOULAT

Julianne Moore attending the "La Tete haute/Heads up "Premiere during the 68th annual International Cannes Film Festival in Cannes, France, 13th May 2015. Credit: Timm/face to face fot. Face to Face/REPORTER STANDING TALL

68th Cannes Film Festival 2015, Red Carpet film "La Tete Haute" and Opening Ceremony . Pictured: Julianne Moore

Julianne Moore attends the Opening Night red carpet at the 68th Cannes Film Festival (2015) ? Darren Brade / eyevine