Natalie Portman [1] opened up about her pregnancy [2] when she stopped by The Ellen DeGeneres Show [3] on Wednesday. In addition to talking about her flawless maternity style [4], the mom of son Aleph also told the host that she doesn't actually know if she's having a boy or a girl just yet. And since Ellen incorrectly guessed the sex of her first child almost five years ago, the Jackie [5] actress bet burritos and $1,000 that her second child wouldn't be a girl. However, if it does turn out to be a girl, the host already has the perfect name in mind: Ellen. We definitely can't wait to see how this bet unfolds.