Marion Cotillard has made the perm chic. Photo: WireImage

Curly-haired girls, put down those flat irons and blow dryers. Your straight sisters' lustrous long reign may be coming to an end.

When chanteuse Marion Cotillard showed up this weekend at a Dior party held in her honor for the film "Nine," mouths flapped at the sight of the actress's tight, frizzy curls; paired with her bob cut, it just looked so playfully chic – as did the Christian Dior metallic silver party dress Cotillard flaunted.

The pin curl look previously favored by fashionistas circa 1980-something is hitting the Spring and Summer '10 catwalk in a big way too.

Old Hollywood 40's-inspired waves were seen at Dior, while a combed-out frizzy perm highlighted the Sonia Rykiel and Marc by Marc Jacobs collections. Volume-loving afro wigs took center stage at Louis Vuitton – all as reported by Grazia.

But before you rush to the hairdresser seeking a perm, you can try the look first without fully committing by playing with rollers. Look for a small size to twist and bobby pin hairspray-prepped hair into, as these rollers create much more texture and curl than their larger counterparts.

Another option for longer-haired girls: sleep in freshly-washed braided hair and awake to fabulousness.

And if you naturally have poufy, humidity-loving curls or waves, just step out the door. It's finally your time to shine.

Perm was the word on Sonia Rykiel and Louis Vuitton's Spring runways. Photos: Getty