The lovely Portman tells People Magazine what makes her so enlightened:
[Her] awareness of the world, in particular, is a major theme for Portman, whose extensive travels, she says, have taught her to respect the Earth and its environment. “If we can find ways to love life and be joyful without being wasteful or destructive — that’s what’s important,” she says.One part of that, for Portman, involves being a vegetarian — from head to toe. “Every time I dress I know I’m not wearing leather, and that’s a great feeling,” she says.

Hmmm. Remember
Attack of the Clones? You’ve probably blocked it from your memory, but that’s okay because Google still remembers.
Here’s Portman in 2002, talking about her wardrobe as Padmé in the
Star Wars sequel (prequel? prequel-sequel?):
Known for bold fashion and hairstyle choices (as was her future daughter Princess Leia, she of the metal bikini fame), Padmé’s 19 outfits made for Attack of the Clones include some a bit sexier than the young Queen would ever have worn.
“There’s one we call the leather-and-lace outfit,” Natalie said, “which is for when Anakin and I have dinner for the first time. It’s this very tight corset, with these gloves, and it’s beautiful. There are a lot of corsets that are very tight, which I’m sure everyone will notice.”
I sure did! Ahem. Anyway, there’s no indication that she meant it was a fake-leather-and-lace outfit. Sure, jetting all over the world making movies is one thing, but wearing something made from a cow’s skin? It sounds like if a particular item of clothing makes her look sexy enough, Portman’s opinion about it could be … suede. Sorry! Sorry.