And she is having a ball.
From shooting for advertisements (for L'Oreal's new BB cream), to hanging out with fellow brand ambassador Freida Pinto, to getting all dolled up for the red carpet, the actress has quite a lot on her plate.
Check out her many looks from her first day at the 66th Cannes Film Festival.
In picture: Sonam wears a sari-inspired Huemn dress and big statement earrings by Suhani Pittie
Text: Sify.com; Images: Twitter/AP/AFP