It's been less than a week since Mila and Ashton welcomed their second child on 30th November, and now the proud dad has taken to his website to reveal their name choice.
A statement on his website A Plus read: 'Dimitri Portwood Kutcher was born at 1:21 a.m. on November 30, weighing 8 pounds and 15 ounces.'
It's thought that the name is a nod to Mila's heritage, as it's a Russian version of the Greek name Demetrius.
Mila, 32, and Ashton, 38, are already parents to 20-month-old daughter Wyatt Isabelle, who they welcomed on 1st October 2014.
The actors originally confirmed the happy news of their pregnancy via a representative to People magazine. The announcement came as no surprise to most however, after Mila revealed to Ellen DeGeneres, while appearing on her talk show back in May, that she wants to have more kids.
When Ellen asked 'Do you want to have more children?' the mum-of-one replied, 'Yes, absolutely, yes yes yes.' Ellen then asked 'Are you trying?', to which Mila laughed 'As in am I having sex? [Laughs] Yes!'
Ashton and Mila first met on the set of That '70s Show, which they filmed from 1998 to 2006, but they didn't begin dating until April 2012 - after Ashton's split from first wife Demi Moore.
They married in July 2015, nine months after Wyatt was born. The pair are famously private, and rarely post pictures of themselves together or their daughter on social media so it doesn't look like we'll get a peek of their son anytime soon!
Mila has reflected in the past on how much motherhood has changed her life. 'I re-prioritised my life, in all honesty,' she told Entertainment Tonight.
'I travelled through all my 20s, and I was very selfish, in a good way, not, like, in a way that I regret. In a great way. And I think having a kid made me realize how incredibly selfless I want to be.
'When we decided to have a kid, we were ready to no longer be selfish... Because innately, as humans, we're very selfish people, and we really wanted to have a family,' she said. 'It's definitely a learning process.'
Congratulations to the new family of four!