Ashton Kutcher says fatherhood has changed his priorities.

Ashton Kutcher

Ashton Kutcher

The 'What Happens In Vegas' star - who has 19-month-old daughter Wyatt with his wife Mila Kunis - admits having a kid has "unexplainably" switched all his priorities.

He shared: "[Fatherhood] takes whatever table you're sitting at, flips it upside down and switches all your priorities around. It's unexplainable.

"I have a new number one priority. Only parents understand the absolute awe of parenthood."

The 38-year-old actor has been making his presence on social media less personal since the baby's arrival and has instead tried to post things which "inspire and educate" others.

He told Parade magazine: "You know what's interesting? I don't really share personal things on my social media channels anymore. I have pulled back. At one point I thought, 'Heck, if I share things first and I have control what it is that I'm sharing, maybe it'll devalue the tabloid story fodder.'

"Ultimately, that came to be something that was untrue. Now the things that I share on social media are stories that inspire ideas, that connect people, that educate people."