Romania's Mungiu and France's Assayas share best director prize at Cannes 

Valery Hache French director Olivier Assayas (L) and Romanian director Cristian Mungiu pose on stage after being both awarded with the Best Director

Romanian director Cristian Mungiu and French helmer Olivier Assayas shared the best director award at the Cannes film festival Sunday.

Mungiu, who won the Palme d'Or in 2007, was rewarded for his critically-acclaimed "Graduation" about a father's dilemma of what to tell his daughter about a corrupt world. Assayas's film, "Personal Shopper" starring Hollywood star Kristen Stewart, got mixed reviews.