Reese Witherspoon attends the 'Mud' Photocall in Cannes, France. Credit: Venturelli/WireImage

Ooh la la!

A radiant Reese Witherspoon was all smiles when she stepped out in Cannes, France on Friday to promote her new film, Mud, in which she stars opposite Matthew McConaughey.

The pregnant star, who is expecting her first child with husband Jim Toth, chose a fitted black Versace mini dress with flattering ruched detail that enhanced her growing baby bump. She accessorized with diamond drop earrings, her massive engagement ring, bright fuchsia heels and black Versace sunglasses.

Despite being several months pregnant, the 36-year-old actress didn't look the least bit jet-lagged at the premiere after having landed in the city the day before.

"The flight over was actually pretty good. I feel great," she told Us Weekly on Thursday about her trip from LAX to France. "I'm excited about showing the movie. The energy here is great!"

That night, the This Means War actress and her CAA agent hubby attended the Ciroc Vodka Erno Laszlo dinner for The Paperboy, where Toth doted on his expectant spouse.

"She and Jim were talking closely…he was clearly protective of her whenever they were standing up or walking around, practically putting both arms around her," a witness tells Us. While walking through the event and conversing with friends, the mama-to-be assured that she was "surprisingly not tired." (Toth and Witherspoon ended up heading out around 11:15.)