The winners of the 75th event are to be announced at the closing ceremony on Saturday, May 28.
Here are all 21 films in contention at the festival this year:
'Crimes of the Future'
The dark genius behind The Fly and Crash, David Cronenberg returns to his body horror roots with a tale starring Viggo Mortensen, Lea Seydoux and Kristen Stewart about people indulging in revolting surgical alterations for artistic pleasure.
'Triangle of Sadness'
The king of cringe, Sweden's Ruben Ostlund took a scalpel to modern bourgeois niceties with his Palme d'Or-winning The Square in 2017. In a similar vein, his latest film places two models and a cleaning lady on a desert island with a group of billionaires.
The enfant terrible of Russian film and theatre, Kirill Serebrennikov, fell foul of authorities with his caustic attacks on conservative values and was barred from travelling to Cannes for two previous nominations. Now in exile, he should be present for his historical tale about the famous composer.
James Gray has made big sweeping dramas, from space odyssey Ad Astra with Brad Pitt, to Amazon adventure The Lost City of Z. This one is based on his adolescence in 1980s New York and a school governed by Donald Trump's father, starring Anne Hathaway and Sir Anthony Hopkins.
Japan's Hirokazu Kore-eda won the Palme d'Or in 2018 for his beautiful and touching family tale Shoplifters. Featuring the star of Parasite, Song Kang-ho, this one is about people dropping off infants in "baby boxes" to be looked after by other families.
'Boy from Heaven'
A daring film about power struggles in the leading centre of Sunni Islam, the Al Azhar University in Egypt, from Swedish-Egyptian director Tarik Saleh.
'Decision to Leave'
Park Chan-wook had an international hit with nightmarish thriller Old Boy that won him the runner-up Grand Prix in 2004. This time, the South Korean brings his unique stylings to the familiar trope of a detective falling for the prime suspect in a murder investigation.
Kelly Reichardt has gradually built up a cult following with her mini-masterpieces about life on the edges of American society, including 2019 sleeper hit First Cow. She is reunited with Michelle Williams for a self-reflective look at a small-town artist trying to overcome distractions.
'Tori and Lokita'
Belgian brothers Jean-Pierre and Luc Dardenne make simple but devastating slice-of-life stories and are among a handful to have won the Palme d'Or twice. Their latest film follows the friendship of two African teenagers exiled in Belgium.
'Stars at Noon'
One of France's most lauded auteurs, Claire Denis is having a busy year, having already won the directing prize at this year's Berlinale. Her Cannes entry is a political thriller set in Central America starring Robert Pattinson.
Romania's Cristian Mungiu won the Palme d'Or in 2007 for his bleak but vital abortion film, 4 Months, 3 Weeks and 2 Days. This one explores ethnic and political tensions in a remote Transylvanian village.
Belgium's Lukas Dhont won the Camera d'Or newcomer award in 2018 for his debut Girl about a trans ballet dancer. Here, he tackles two teenagers separated by a tragedy.
Having won the Un Certain Regard section in 2018 with Border, Danish-Iranian Ali Abbasi heads for the Iranian religious city of Mashhad, where a family man seeks to rid the streets of sex workers.
A tale of love, life and tragedy in a Paris theatre troupe against the outbreak of Aids in the 1980s from French-Italian director Valeria Bruni Tedeschi.
Italian director Mario Martone pays homage to his hometown of Naples after spending 40 years away.
'Brother and Sister'
Marion Cotillard stars in a drama about feuding siblings brought back together by the death of their parents, directed by Cannes veteran Arnaud Desplechin.
Iran's Saeed Roustayi made a splash last year with his punchy cop thriller Just 6.5. His new film examines the economic struggles of a family in a country hit by international sanctions.
Following a donkey from the circus to the slaughterhouse, this treatise against animal cruelty is from 84-year-old Polish director Jerzy Skolimowski, who was first in competition at Cannes in 1972.
Spanish director Albert Serra heads for Tahiti to explore the diplomatic tensions around French nuclear testing.
'Mother and Son'
France's Leonor Serraille follows a Senegalese mother from the 1980s to the present day as she tries to establish a life in the Paris suburbs.
'The Eight Mountains'
A story of a lifelong friendship between boys and their rural home from Belgian husband-and-wife team Felix van Groeningen and Charlotte Vandermeersch.