Charlize Theron denies she was ever engaged to Sean Penn

Charlize Theron has said claims that she and Sean Penn were once engaged are “bulls**t”.

The 44-year-old Bombshell star dated the 59-year-old Milk actor for 18 months before they split in June 2015, but insists they were never engaged to be married.

Theron responded to the rumours on The Howard Stern Show, saying: “What? That’s not true. No, I did not ‘almost get married to Sean’, that’s such bulls**t. No, we dated, that was literally all we did, we dated.”

Sean Penn and Charlize Theron arrive for the screening of the film Mad Max: Fury Road at the 68th international film festival, Cannes, southern France, Thursday, May 14, 2015. (Photo by Joel Ryan/Invision/AP)
Sean Penn and Charlize Theron dated for 18 months but she has denied rumours that they were engaged. (AP)

She added: '“It was a relationship, for sure. We were definitely exclusive, but it was for barely a year. We never moved in. I was never going to marry him. It was nothing like that.”

Read more: Sean Penn admits he's difficult to work with and 'not good with humans'

The Oscar-winning couple were friends for 18 years before they began dating between December 2013 and June 2015, and it was reported that Penn had proposed to Theron in Paris in November 2014.

Theron had already adopted her first child, Jackson, in March 2012 and there were even rumours that Penn was planning to become Jackson’s father.

From left to right, WME Co-CEO Ari Emanuel, Jackson Theron, actress Charlize Theron, and actor Sean Penn attend the generationOn block party at Fox Studios in Los Angeles on Saturday, April 18, 2015. (Photo by Dan Steinberg/Invision/AP)
Charlize Theron dated Sean Penn between December 2013 and June 2015 and said he knew she wanted more kids. (AP)

But she told WSJ magazine in 2016: "The stories saying that Sean was going to adopt Jackson and all of that were not true. It's not something that happens in 18 months. You can't do that to a child.

"So there was an understanding that I was a single mum with a very young boy who I had to put in a situation where he understood that Mummy dates but that he does not have a father.

“You have to be very careful and very honest about that stuff. And Sean was great with all of that.

"And in my honesty about wanting to have more kids, there was an understanding that a relationship had to go somewhere before it was going to be – what you hope for, which ultimately did not happen."

CANNES, FRANCE - MAY 20:  Sean Penn and Charlize Theron embrace each other as they leave the screening of "The Last Face"  at the annual 69th Cannes Film Festival at Palais des Festivals on May 20, 2016 in Cannes, France.  (Photo by Tristan Fewings/Getty Images)
Sean Penn and Charlize Theron embracing at the 2016 Cannes Film Festival a year after their split. (Getty Images)

She added: "We had a very clear understanding. He knew that I was thinking about filing for another adoption but that we weren't filing together."

Read more: Charlize Theron explains that her first child Jackson is ‘not a boy’

Theron adopted her second child, August, in July 2015.

Theron told Vogue earlier this year: “I never wanted to get married. That’s never been something that’s important to me. On the lives of my children, I’ve never been lonely. I’ve never felt alone.”

She added: “My life right now just doesn’t allow a lot of room for something like that to happen. But in saying that, there’s not this thing that drives me [to have a romantic relationship].”