What is AR Rahman doing in Cannes film festival?

Grammy and Oscar-winner A R Rahman caught the attention of everyone at Cannes Film Festival. He is in Cannes to promote his directorial Le Musk (India's first virtual reality film) at the festival. He took to Instagram, where he posted several photographs of himself. In one image, Rahman is seen sitting and holding a glass of apple juice and salad kept on the table. He captioned the image: "8:51 pm iftaar".