The 36-year-old actor and his 30-year-old fiancée are expecting their first child, rumoured to be a baby girl, later this year and he can't wait to be a father.
A source told PEOPLE magazine: "Ashton has been taking such good care of Mila. He's doting on her and telling her she looks beautiful. He understands she's going through changes and he hasn't judged her for it."
The insider added: "Ashton supports her 100 percent.
"Ashton was meant to be a father. It's all he can talk about!"
The couple splashed out on a new $10,000 million 7,351 square foot mansion in Beverly Hills after he put his $12 million bachelor pad on the market, as they wanted a more child-friendly house that is closer to his office.
Another source told Us Weekly magazine: "The house is perfect for a family."
The property is "very traditional and different" from the star's previous modern homes and includes access to "hiking trails that they can get to just outside their front door."
Their new two-story abode, which is located in an exclusive gated community where Nicole Kidman and Cameron Diaz reside, also features three bedrooms, four bathrooms, a large porch, kidney-shaped pool, vegetable garden and has "lots of privacy."
While Ashton's personal life is going well, CBS announced on Wednesday (14.05.14) that his show 'Two and a Half Men' will be axed after its upcoming 12th season.
Ashton replaced Charlie Sheen on the sitcom after he was fired from the show over his erratic behaviour in 2010.