The 34-year-old actress, who's starring in the upcoming film Suite Français, rocks a striped black and orange 60s-style minidress by Louis Vuitton with an amazing platinum hairdo to boot.
And in the accompanying interview, she tells Elle all about juggling work with being a mum to Matilda, her eight-year-old daughter with the late actor Heath Ledger.
"I feel like I'm so good at raising a kid when I'm not working," she said. "I don't forget anything. I've got everything covered. It's a real luxury to have a moment when I'm not scrambling. I feel like most of my life, I'm trying to do two things at once, both to the best of my abilities.
"So that leaves me feeling pretty exhausted. I'm the person who falls asleep all the time. You invite me over for dinner or to a party, and there's a whole scrapbook of pictures of me napping. I've even been given a nickname because of my snoring."
Umm, she certainly doesn't look tired in this amazing shot.
Speaking about how she chooses the projects to devote her time to, Michelle said,
"[It's always just been] an instantaneous response that happened while I was reading a script. It's the only thing I ever went off – not advice, not some picture in terms of placement or strategy – but just a feeling that came off of the page and into my heart.
"It suits me best to work with friends, and to make something that feels really homemade," she added.
When it comes to social media? She'd rather read poetry. "I read poems on my phone when I wake up in the morning.
"It opens you up for the rest of the day, and suddenly your life becomes a little more observed. And when it becomes more observed, it can't help but start to become more beautiful."
*Switches off Instagram page*
See Michelle Williams' full photo shoot and interview in the April issue of Elle UK, on sale March 5 and also via the digital edition through Apple Newsstand.
See more pictures of the beautiful star in our gallery below: