Mila Kunis has revealed she and Ashton Kutcher have a very special connection to Natalie Portman – they have both kissed her on screen.

The Jupiter Ascending actress locked lips with Natalie in their 2010 movie Black Swan, and Ashton smooched her in rom-com No Strings Attached a year later.

Spilling the beans in a Reddit Q and A, Mila said: “She’s a lovely kisser, very polite.

“But here’s a little known fact: there’s one person in the world that both Ashton and I have kissed, and that’s Natalie Portman.”

Natalie Portman and Mila Kunis attend a ballet gala together
Natalie Portman and Mila Kunis kissed in Black Swan (Mehdi Taamallah/Abaca/PA)

She said of getting up close and personal with Natalie in the movie: “I mean… when you have a kissing scene in a film it’s not something you think about as a kissing thing. You have all these crew around.”

Mila, 31, also opened up about being a mum to the couple’s four–month-old daughter Wyatt, loving her husband’s smell and how she harbours dreams of teaching.

Talking about motherhood, she revealed it was totally “life-changing”.

Mila went on: “I am proud to be a stay-at-home mom. I have no desire to be in front of the camera. I find her to be the most challenging job I’ve had.

Mila Kunis at  apremiere
Mila Kunis said being a mum has changed her life (RE/Westcom/Starmax/Empics)

“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. I want an eco-friendly 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.”

Mila Kunis and Ashton Kutcher look cosy at a basketball game
Mila Kunis and Ashton Kutcher became parents in October (Danny Moloshok/AP/PA)

Talking about Ashton, who she is rumoured to have secretly married, Mila revealed she is drawn to his manly scent.

“He smells like a man. A real man! But he smells like a man. He does not wear cologne. But he makes sure he showers. Never offending. He has a very good natural smell about him, yeah,” she said.

Mila also told how she would have liked to be a teacher before she had Wyatt, and said she still likes the idea of teaching a course in something.

She said: “I would teach a course… nobody should take any class from me, let’s prefix it with that, but if you’re forced to take any class from me… I could teach a class on ‘How to be an awesome, bada** chick who knows how to take apart and put together a gun blindfolded, make a four-course meal, and parallel park the s*** out of a car.’ I mean, don’t you think? That would be my course.”