Mila Kunis admits she and Ashton Kutcher were "crazy neurotic" about keeping their relationship a secret at one stage.

Ashton Kutcher and Mila Kunis

Ashton Kutcher and Mila Kunis

The 34-year-old actress - who married the Hollywood star in 2015 - has confessed to being overly-protective of their relationship when they first started dating in 2012.

Mila - who has daughter Wyatt , three, and 19-month-old son Dimitri with Ashton - shared: "We were crazy neurotic about keeping it a secret, probably to a massive fault where we alienated so many friends, I'm sure."

The loved-up couple previously worked together on the sitcom 'That '70s Show', and Mila revealed she felt a spark during their first real-life kiss.

Speaking on the 'Armchair Expert With Dax Shepard' podcast, she added: "I'll tell you this - while I was single I never spent the night at another guy's house.

"This was the fist time that I spent the night at the guy's house."

Despite the success of 'That '70s Show', Mila has never watched a single episode of the programme.

The brunette beauty admitted that, at the time, she never considered acting to be anything more than a "hobby".

She said: "I didn't look it as an art form, I looked it as a hobby. And because it was a hobby, I don't need to dissect it."

Meanwhile, Mila previously revealed she has gained confidence and become "incredibly selfless" since she became a mother.

Asked how motherhood has changed her, she said: "It changed everything. It gave me a really interesting sense of confidence.

"My priorities shifted and I think I became incredibly selfless. Knowing that I was going to have a baby made me be like, I have to give up so much of myself and I'm happy to do that. It wasn't like, 'oh I'll sacrifice'. It was more, 'I want to do this.'"