Leading up to the birth the couple have been fairly vocal about their second pregnancy.
In fact back in October, Kutcher accidentally revealed that the pair were expecting a baby boy during an appearance on the Today show.
Talking of Wyatt, he said: 'She points to Mila and she's like, "baby brother" when she points to the belly.'
Mila is already prepping for less down time as a source told E! News she hasn't been getting as much time to herself thanks to her toddler, two-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 said.
However, it looks like her husband is trying to do all the heavy lifting for her: '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.'
The couple attend a game of the NLCS between the Chicago Cubs and the Los Angeles Dodgers at Dodger Stadium on October 19 this year and rocked matching team jerseys.