Mila Kunis: 'Pregnancy is so different this time!'

Mila Kunis is having a "very different" pregnancy this time around.

The 32-year-old actress is expecting her second child with husband Ashton Kutcher. The pair is already parents to 20-month-old daughter Wyatt, and the tot is keeping her mother on her toes - so much so that she keeps "forgetting" how far along she is in the pregnancy.

"I forgot how far along I was today," Mila told Entertainment Tonight at a screening of her new movie Bad Moms in Los Angeles on Thursday night (07Jul16). "I think with the first one, you're so enamoured with the initial experience that I was constantly checking the app, 'What fruit size is the baby? Is it the size of a grape or an avocado?'

"Now I'm like, 'Wait, how far along am I?' You're busy running after the other one and working full time."

As the title suggests, Bad Moms explores a group of women who ditch their perfect mother images to embrace their rebellious sides. But in real life, it is Ashton who has been something of a maverick when it comes to the world of parenting.

"Sometimes babies projectile poop, and it was one of those days where there was a lot of poop," Mila recalled. "I turn around and he's like, 'I got it babe!' and I was like, 'Great!' And then I turned back around, and he literally bathed her in the sink, which is fine, and then wrapped her in an entire roll of paper (towels).

"I was like, 'What are you doing?' and he's like, 'Drying her up!' and he goes, 'I couldn't find the towel.' And I literally was like, 'What is happening!?' She was cocooned in this little Bounty (paper towel brand) roll, and I was like, 'Oh my god I love you so much!' It made me so happy. I took so many photos of it. I literally was dying laughing."