The 34-year-old opted for a blue, long-sleeved top with gold detailing, which she teamed with a black pencil skirt which featured a purple and orange pattern for some quirky detail.
Michelle Williams stepped out for the Louis Vuitton Spring 2015 show
Michelle kept her accessories simple, complementing her outfit with some black patent strappy heels, and a monochrome clutch bag with gold detailing.
The Blue Valentine star went for a classic yet striking beauty look, opting for natural makeup. Her platinum blonde hair was slicked back but kept slightly messy for an effortlessly cool yet polished effect.
Selena Gomez and Miranda Kerr also stepped out for the catwalk presentation in sleek ensembles. Selena chose to mix and match patterns across her skirt, crop top and clutch bag, and opted for the same shoes as Michelle.
Meanwhile, Miranda Kerr chose a black dress with a plunging neckline which she paired with knee high black boots, finishing her look off with a grey bag.
Selena Gomez and Miranda Kerr were also spotted at the Louis Vuitton show during Paris Fashion Week
Michelle shares a close relationship with Louis Vuitton, and is currently starring in their autumn/winter 2014 campaign, the third campaign in a row she has fronted for the iconic French fashion house.
Channelling retro chic in the images shot by Peter Lindbergh, Michelle wows in a pastel dress teamed with a white turtleneck jumper from what Nicolas Ghesquière's debut collection for Louis Vuitton following the departure of Marc Jacobs.
"The resulting series of portraits hints at the woman behind the actress," read a statement from the brand. "Revealing the intriguing balance of force and fragility that made Michelle Williams such a compelling choice as the face of Louis Vuitton."