‘Sh*t like this does not work’ Mila on her original set-up with Ashton

After Mila Kunis starred in Friends with Benefits, and Ashton Kutcher starred in No Strings Attached, the two actors – who first met on the set of That 70s Show – decided to live out their respective film scripts.

According to popular actress, the pair didn't decide to embark on the traditional relationship route initially, agreeing instead to remain friends… with benefits.

Speaking to Howard Stern on SiriusXM yesterday, the Black Swan star revealed that after re-igniting their friendship back in 2012, they couldn't hide their feelings for one another, but weren't sure whether a relationship was on the cards.

Mila admitted 'she got butterflies' while at a party with him and explained that despite the fact Ashton had intended to set Mila up with a friend, he got pretty 'territorial' when it came to his former co-star.

After unexpectedly spending the night together, Mila was adamant she wouldn't be staying, telling Howard: "Like, when I was single, I was so adamant about never, as stupid as it sounds, never staying over at a guy's house. I was, like, peacing out, and he was like, ‘You're not leaving.’"

"Well, I'll tell you this much, he didn't let me leave," she continued. "At two in the morning I was like, 'I'm gonna call an Uber! See you later.' And he was like, 'You're crazy!' And I was like, 'Bye!"

With Ashton only months on from divorcing Demi Moore, both stars decided it was best to keep things casual, with Mila saying: "If we just paid attention to these movies, we should know that sh** like this does not work out in real life."

"Well, we clearly didn't pay attention," she laughed. "We shook hands, we're like, 'Let's just have fun!"

Revealing more than one might expect of the notoriously private actress, Mila revealed that it reached a point where neither was happy if the other was 'with' someone else.

"It ended up going from just having fun to genuinely wanting," Mila admitted. "When I realised I was nervous was when I spoke to him.  I was like, 'I don't like this anymore.'"

Mila and Ashton, who share one daughter together, tied the knot last year and are now said to be expecting twins.