The 39-year-old actor said some tabloid magazines "lack integrity."
Ashton Kutcher isn't going to let a tabloid magazine have the last word when it comes to his marriage to Mila Kunis.
On Sunday morning, the 39-year-old actor responded to a story in Star magazine that included photos of him out with a woman, along with the headline: "Hey, Ashton! Who's the girl?"
WATCH: Ashton Kutcher Is 'So Happy' That Bachelor in Paradise Is Back
"You should have heard how upset Mila was that I spent the day with our cousin," Kutcher tweeted sarcastically along with a photo of the tabloid report. "Sorry Aunt Jodie, these magazines lack integrity."
This isn't the first time the former That '70s Show star has responded to cheating allegations. While being honored with the Robert D. Ray Pillar of Character Award in April, Kutcher addressed reports that he was unfaithful to Demi Moore prior to their split in 2011, which ultimately led to their divorce in 2013. He recalled a time when his "name splashed across every gossip magazine as an adulterer, like, five years ago."
WATCH: Ashton Kutcher Says Wife Mila Kunis Is Basically an Oracle -- 'She's Always Right'
"Character comes out when those magazines tear you apart for something you may or may not have done and you gotta go out and perform tomorrow, with everyone looking at you like you might be an adulterer," he told the crowd. "I had the great fortune of getting a divorce because I felt the impact of it and how much loss is in there and how much love is in there and that it's not neat or clean or messy. And I understood finally my parents' divorce in a whole different way."
A month prior to Kutcher's speech, which also included him praising his current wife, ET spoke with Kunis about their "crazy" home life with two children running around. "We used to be cool and clean," the 33-year-old actress quipped. "It's like, our house used to be nice and modern and pristine -- all goes out the window when you got kids."