John Shearer, Getty Images for Vanity Fair

If there's one thing Natalie Portman is (besides beautiful and extremely talented), it's eco- conscious.

You'll remember the 29-year-old Oscar nominee started the now-shuttered vegan shoe line, Te Casan, in 2008 and currently sports a conflict-free diamond engagement ring. Yesterday, much to the delight of those looking to copy her style, she rocked H&M's darling new Conscious Collection at a Vanity Fair party in L.A.

Portman wore a white cotton sheath dress from the mass retailer's new eco-friendly collection to the mag's pre-Oscar event yesterday. The frock, which features beautiful long lace sleeves and a babydoll silhouette that is perfect for Portman's pregnant state, is made out of 100-percent recycled polyester and retails for a very affordable $49.95.

Portman paired the piece with eco-friendly jewelry by Monique Péan, including fossilized woolly mammoth ivory and diamond slice drop earrings and a stack of naturally-shed buffalo horn and fossilized woolly mammoth ivory bangles. Her strappy metallic heels and sweet pregnancy glow pulled the whole look together flawlessly.

Of course, this isn't the first time that Portman has worn a democratically-priced garment to a fancy event. A year ago, she donned a gold slip dress from the Rodarte for Target capsule collection (which was has just been re-issued) that cost a cool $39.99.

Keep clicking for more looks from H&M's gorgeous Conscious Collection, which is packed full of summer whites and buff hues.

And, while we're on the subject of pretty dresses, read up on our style predictions for Sunday night's Academy Awards.