Emma Watson, wearing a tight white dress, makes her way through Nice Airport on May 14, 2013 in Nice, France. Credit: Marc Piasecki/FilmMagic

This time, no one would would have mistaken Emma Watson, walking through Nice Airport in France on May 14, as a child. The Perks of Being a Wallflower actress, who was assumed to be an unaccompanied minor this past December while going through customs at New York's John F. Kennedy International Airport, rocked a sexy, mature look for her travel day this time around.

Clad in a tight, white skater dress by A.L.C. and slim ankle boots, a sunglasses-wearing Watson looked like the stylish movie star she is. In fact, the 23-year-old actress was on her way to the famously glamorous Cannes Film Festival, which kicks off Wednesday, to promote her new film, The Bling Ring, directed by Sofia Coppola.

The petite actress, perhaps most well-known for playing prim and proper Hermione over the course of eight Harry Potter movies, has been tweaking her squeaky-clean image of late. In The Bling Ring, based on a real-life gang of celebrity-obsessed teen thieves, Watson gets to play a bad girl, and on the cover of British GQ's cover this month, she wears a provocative cutout dress similar to the one Julia Roberts donned for her role as a hooker in Pretty Woman.

Indeed, Watson's grown-up, sexy-minimalist style was also on display at the Met Costume Institute Gala earlier this month as well. The British beauty looked amazing in a midriff-baring Prabal Gurung cutout dress with a thigh-high slit.