After a cryptic posting that was interpreted as a rebuke to those speculating about his private life, Ashton Kutcher has a more forthright message.
The Two and a Half Men star wrote on Twitter: "When u ASSUME to know that which you know nothing of you make an ASS out of U and ME."
His robust comment comes as the 33-year-old actor was seen in public for the first time since rumours began about his marriage to Demi Moore.
He was spotted driving through Los Angeles, presumably after a day on the set of the hit series.
The rumour mill went in to overdrive after Ashton enjoyed a guy's night out on the couple's sixth wedding anniversary.
Demi, 48, hasn't been seen since Monday when she attended a premiere with Jennifer Aniston.
She has been silent, leaving her husband, who is still wearing his wedding ring, to speak on their behalf.
On Thursday, he tweeted a link to Public Enemy's classic song Don't Believe the Hype on Thursday.
It's not the first time the couple have had to contend with reports of trouble in their marriage.
Last year, they brushed off stories of infidelity with Ashton writing on Twitter: "I think Star magazine calling me a cheater qualifies as defamation of character. I hope my lawyer agrees."
His wife responded, writing: "Excellent point my love."
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