Did Ashton Kutcher REALLY cheat on Mila Kunis at the start of their relationship?

They’ve been dating since 2012 and have just welcomed their baby daughter Wyatt Isabelle into the world, but that hasn’t stopped some of Ashton Kutcher’s less impressed critics alleging that he cheated on Mila Kunis back at the beginning of their relationship.

Ashton's rep has denied the claim, but according to US Star Magazine, 36-year-old Ashton hooked up with a Swedish makeup artist a few months after he started dating Ted star Mila, and reportedly didn’t mention her name once during his tryst. Well you wouldn’t really, would you…

A source claimed to the mag that the makeup artist – named Linn – met Ashton at Los Angeles celeb hangout The Writer’s Room and went over to introduce herself after he waved her and her friend over.

“Ashton seemed really flirty, and they spent time making small talk. After about 20 minutes he suggested they all go back to his house to continue drinking,” the insider went on.

“Linn and her pal were already pretty tipsy, and they said OK.”

The magazine claims that he then took the woman into his personal cinema room and, er, events transpired. They never ended up sleeping together but Ashton supposedly texted her the next day and said he wanted to see her again, but they never met up.

It’s not the first time there’s been speculation about Ashton’s faithfulness – back when he was still with Demi Moore, the one thing that was said to have ended their ‘open’ marriage was his 2011 fling with a then-22-year-old woman called Sarah Leal, as Demi announced their divorce seven weeks after the story broke.

But seeing as Ashton’s rep claims he and Mila didn’t become an official item until July 2012, could this all be a big storm in a teacup?