Leighton Meester is all smiles as she arrives at the Christian Dior Ready to Wear Spring / Summer 2012 show during Paris Fashion Week held at Musee Rodin on Friday afternoon (September 30) in Paris, France.

The 25-year-old Gossip Girl actress wore an off-the-shoulder Christian Dior ruffle dress with Dior fine jewels and “Promenade” bag. She completed her look with Louis Vuitton pumps with three white bows.

PHOTOS: Check out the latest pics of Leighton Meester

“Hey, beautiful!” Leighton said as she ran into costar Roxane Mesquida, who plays her nemesis on the show.

10+ pics inside…