“I have amnesia about having a baby, which is why I think I allowed this to happen,” the Sin City star, 36, joked.
She added: “I don’t remember any of it!”
And it sounds like big sisters Honor, 9, and Haven, 5, are excited to have a baby sibling.
“[They’re] stoked,” said the Planet of the Apps star.
While she’s remaining mum on the baby’s gender, the expectant mama is trying to decide on a name.
“So my husband’s name is Cash, that’s his actual real name, so our kids had to have unusual names,” she explained, adding, “That were also H, double syllable, has to be a word, can’t be too weird,” she said. “It has to be a H!”