Mischa Barton @ Cannes Film Festival 2007

Mischa Barton has been knocking it out of the fashion ballpark at the Cannes Film Festival in France this year.

The former O.C. actress wowed the crowd with her billowing gown and wavy tresses at the premiere of A Mighty Heart on Monday.

Mischa struck gold again (literally) at the premiere of Le Scaphandre Et Le Papillon (The Diving Bell and the Butterfly) on Tuesday.

Looks like she’s starting a new fashion trend — backwards necklaces!

Mischa‘s backwards necklace trend — LOVE IT or HATE IT?