The pair hasn't been shy in talking about their growing family over the last several months, revealing their emotions and accidentally slipping a few secrets, too—you know, like when Kutcher accidentally revealed their baby's sex (it's a boy)!
They've also been honest in dishing how they've been prepping for the addition to their family, feeling a little more prepared having gone through the experience before.
Here's what they've been doing to get ready for baby No. 2:
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Practicing Less Down Time: Considering they're going to have two little ones under the age of three running around their house, they've already gotten used to little down time.
In fact, a source close to the pregnant mama told E! News she hasn't been getting as much rest during her second pregnancy while parenting 2-year-old Wyatt.
"She is feeling good, although taking care of a toddler while pregnant is different for her than the first time around, where she could rest a lot more," the insider told us. "Ashton dotes on her though. He always carries Wyatt and doesn't want Mila doing any lifting at all. He has always been very hands-on, but he has really been taking over lately and trying to give Mila a break."
Kunis reiterated that while chatting with Kelly Ripa on Live! With Kelly in July. "The second one, I'm running after a toddler, or working, so I'm like, 'Oh, that's right: I'm pregnant,'" she said at the time.
They're Less Obsessive: While dividing time between two children, it's important to focus on the big picture rather than every little details. In an interview with Conan O'Brien, Kunis revealed this time around, she's practicing being a little less obsessive. She doesn't have all the crazy apps and daily checkups like she did while pregnant for the first time.
"With the first one, there were these apps where you could check daily to see the size of your baby based on fruit. So, 'Oh, today my baby's the size of guava,' or a banana, or avocado.' And I did it, like, every day," she revealed. "[This time] I couldn't even tell you how far along I am right now. I'm like, 'I don't know. A couple months?' I genuinely don't know how far along I am. I'm like, 'Somewhere between this and that.'"
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They're More Confident: When it's two children vs. two adults, parents have to maintain their confidence in order to keep calm in the house when things get wild. Kutcher told the Today show he definitely feels more capable this time around.
"You have a recognition that they're pretty durable. You're not going to break them," Kutcher said, adding, "The first one, I almost became a doula. I was reading every book...This one, I haven't done anything. I'm like, 'Well, we didn't break the first one.'"
Practicing How to Balance Work and Life: With Wyatt's arrival, they were able to get a hold on what it's like being first-time parents as well as actors. For example, the actress filmed Bad Moms after giving birth to little Wyatt, so she now feels like she knows how to balance her career with parenting. The biggest lesson she learned is nothing's perfect.
"I've changed my work schedule a little bit," she told the Today show over the summer. "I think that when I got pregnant with Wyatt, I put so much pressure on myself to figure out, 'How am I going to balance work and life?' And I realized it's impossible. It literally ate me alive. No one put the pressure on me. I just did it fully to myself."
She continued, "When you do a film, you work, on average, 15- to 17-hour days. That's my baby's entire day that I'm missing...You have to pick a project that's worth it."
They Already Have a Name Picked Out: In probably the most important thing in preparing for the second baby, the couple has already picked out a name.
Kutcher sat down with Conan O'Brien this week and dished, "We have a name dialed in that we've had for a while, but the problem is, if you get the name too soon, suddenly there's like slight trepidation about the name...Now we're like, 'Maybe we don't love the name,' even though we both love the name!" he said with a laugh. "So, I think we have a name."