Mila Kunis says being a mother is the hardest challenge she’s ever taken on.

Actress, Mila Kunis gave birth to her baby girl, named Wyatt, last October and since then she’s quickly discovered what all new mothers do: This is by far the hardest job going around and the most rewarding.

“I’m proud to be a stay-at-home mom,” says the Black Swan star and wife of Ashton Kutcher.

Mila Kunis with baby Wyatt. Image via Instagram.

Kunis lost 9kg and underwent a punishing five-hour-per-day ballet regimen to play the understudy to Natalie Portman ‘s crazed ballerina in Black Swan but says that ordeal was nothing compared to her current (and forever) role of being a mum.

The part-time chicken thief (long story) found time for a pretty revealing Reddit Q and A late last week though and spoke candidly about how life has changed since she gave birth.

“It is the most life-changing experience you can have, in my opinion. EVERYTHING changed,” said Kunis of giving birth.

“The amount of love that you have, the type of love that you have, changes, the way you look at the world changes … everything has changed, because of her.”

Family unit: Ashton Kutcher, Wyatt and Mila Kunis. Image via Instagram.

Little Wyatt is being raised biligual. Kunis, who was born in the Ukraine, speaks Russian to her, and Kutcher is also learning the language. Since having Wyatt, Kunis says she’s become more aware of the world around her and a lot more green in her approach.

“I want an ecofriendly car, I want to compost everything, because I want the world to be better for her. And you have the opportunity to make a really great child for the world. Or a really great human being,” she wrote.

Check out our gallery of celebrity mums who keep it real. Post continues after the pics…

Zoe Foster Blake.

Kelly Clarkson.

Kate Winslet.

Kate Middleton.

Hilary Duff.

Drew Barrymore.

Adele.

Julia Roberts.

Reese Witherspoon.

Mila Kunis.

Christina Aguilera.

Kunis and Kutcher have both been hands-on with Wyatt and have had their mums staying to help with the baby rather than taking the usual celebrity route and hiring a nanny.