Natalie Portman picked a peephole Vena Cava dress last night for the LA premiere of No Strings Attached. She hit the red carpet without fiancé Benjamin Millepied, but her costar Ashton Kutcher was happy to pose next to his Carven-clad wife, Demi Moore. Her daughter Rumer Willis smiled solo just ahead of today's release of her new Badgley Mischka ads. We caught up with Ashton as he headed into the screening, and he said unfortunately Natalie's on her own when it comes to parenting tips since he really only knows about kids older than 8! Their castmate Greta Gerwig said, though, she was thrilled about Natalie's surprise pregnancy and revealed that the mom-to-be is an amazing vegan cook. Greta kept company with a green-clad Lake Bell and Mindy Kaling, who summed up the evening by tweeting, "It's not gonna get much cuter than tiny Natalie Portman, pregnant."