Appearing on The Ellen DeGeneres Show Friday for a Mother's Day special, Kunis revealed that their news was hidden far longer than anyone imagined.
"We were actually able to hide it for a very long time, yeah it's amazing," Kunis told DeGeneres.
Still being predictably evasive, the That 70s Show actress wouldn't reveal the due date or the baby's gender.
"Some time this year," she said. "I promise you, it will be this year."
She did, however, share that her pregnancy cravings have been odd to say the least.
"I'm very stereotypical," she said of her cravings. "I eat sauerkraut all day long. … This is the worst craving to have because sauerkraut smells and so every time you open up a jar it just reeks in the whole kitchen. It's not like ice cream where everything smells lovely."
DeGeneres teased her about her food cravings, saying that perhaps Kunis' vinegar-based cravings might mean she's having a boy, to which Kunis responded, "Interesting. Okay."
The Jupiter Ascending star also said that Ashton is in the process of learning Russian so that he can participate in speaking to their child in Kunis' native tongue.
"He's been taking [Russian] classes for probably like six months now," she said. "He does it twice a week. A woman comes to the house to give him lessons ... it's really, really great."
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Kunis told DeGeneres she plans on a natural birth, but will be at a hospital in case of an emergency.
"I'm gonna do it as all natural as I possibly can unless there's an emergency or something that should wrong," Kunis said.
And by natural, the Black Swan actress means with no epidural.
"I know, I'm crazy. I mean, I did this to myself I might as well do it right," she said. "I wanted this. It's not like no one made me do this."
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According to Kunis, the couple was engaged much longer than the public ever knew and were able to enjoy betrothed bliss in private.
"We were able to keep this private for two months — two months without anybody knowing," she said of their engagement. "I think everybody assumed we've been engaged for so long that I was wearing the ring in public for two months and no photograph was ever...like nobody ever commented on a single photograph. It was amazing."
Image via Wikimedia Commons