Ashton Kutcher is "so proud" of his ex-wife Demi Moore in The Substance

But Ashton has lauded the star's 2025 Oscar-nominated performance in the 2024 body horror film, which sees fading actress Elisabeth Sparkle take a black market drug to become a younger and sexier version of herself.

Whilst promoting his new FX series, The Beauty, Ashton told Entertainment Tonight: "I mean, one, Demi's performance in The Substance, obviously, she got extraordinary accolades, I'm so proud of her. She killed it."

The former couple met in 2003 at a casual dinner with pals and started dating shortly afterwards.

In September 2005, Demi and Ashton said "I do" in front of 100 guests at their home in Beverly Hills, California, to which a friend of hers described it as a "beautiful wedding" to People.

But the pair split up in November 2011, with their divorce finalised in November 2013.

In Demi's 2019 memoir, Inside Out, the star revealed that the pair had threesomes, and explained she "wanted to show him how great and fun" she was, but her wild side backfired on her after Ashton allegedly used it as an excuse to cheat.

Demi said: "Because we had brought a third party into our relationship, Ashton said that blurred the lines and, to some extent, justified what he'd done."

In 2020, Ashton - who, aged 26, took on Demi's three daughters, Rumer, Scout, and Tallulah from her previous marriage to 70-year-old actor Bruce Willis - said everything is "all good" between him and Demi.

Appearing on the WTF with Marc Maron podcast, he added: "There's no badness. It's all good, we don't hang out. I make a really conscious effort to stay in touch with the girls. It was eight years."

Ashton - who, with Demi, looked into other fertility treatments and adoption after they suffered a miscarriage six months into their late-term pregnancy in 2006 - continued: "I was helping raise teenage girls through their adolescence. I love them.

"I'm never going to stop loving them and respecting them and honouring them and rooting for them to be successful in whatever they are pursuing."

In 2023, Ashton - who admitted the responsibility of being a stepdad to Rumer, Scout, and Tallulah, aged 26, was "a lot" - said that he had to learn to "own" his mistakes so he could move on following his and Demi's divorce.

He told Esquire: "Nothing makes you feel like a failure like divorce. Divorce feels like a wholesale f****** failure. You failed at marriage. You own the s*** you did wrong, and you go forward."

Ashton went on to marry his That 70s Show co-star Mila Kunis, 42, in 2015 and has Wyatt, 10, and eight year old Dimitri with her.