Mila Kunis has lifted the lid on her relationship with former child star Macaulay Culkin, revealing they could not walk in public together because his fans reacted in an “abnormal way”.

The Bad Moms actress said she was 18 when she dated Macaulay, who was one of the world’s most famous actors after starring in Home Alone and Home Alone 2: Lost In New York.

She told radio host Howard Stern that Macaulay’s fans had a “weird attraction” to him and would scream whenever they saw him.

Mila Kunis at apremiereMila Kunis said being a mum has changed her life (RE/Westcom/Starmax/EMPICS Entertainment)

“He was huge,” Mila said on Sirius X FM. “You couldn’t walk down the street with him.

“He always had this weird attraction, like fans just screamed when they saw him. They didn’t know how to react. It wasn’t like a normal response to a celebrity. Fans responded in a very abnormal way to him.”

Mila and Macaulay split up in 2011 and she is now married to her former That ’70s Show co-star Ashton Kutcher.

Macaulay Culkin in a Compare The Market advert (Compare The Market/PA)Macaulay Culkin (Compare The Market/PA)

She told Howard that she and Ashton initially wanted to have a casual relationship but failed to learn lessons from their previous films – Mila’s Friends With Benefits and Ashton’s No Strings Attached.

“We were in similar movies and we should have paid attention to them because this doesn’t work in real life,” she said.

“We clearly didn’t pay attention and we shook hands on it and said we would just have fun. We literally lived out our movies.”

Mila Kunis and Ashton Kutcher Mila Kunis and Ashton Kutcher (Danny Moloshok/AP)

Mila and Ashton had a daughter, Wyatt Isabelle, in October 2014 and the couple are expecting their second child together.