The singer vowed to keep tight-lipped about the details of their plans, but there is speculation that he could stray from his indie rock roots on the new venture.
"I'm a fan of Ronson, who isn't? We have something coming up but it's very hush-hush," Barat told the Daily Star. "I don't want to jinx anything so my lips are sealed but it could be brilliant."
Carl is also hoping to make time for his supergroup The Chavs, which includes The Charlatans' Tim Burgess, Razorlight's Andy Burrows, Klaxons' Jamie Reynolds and Primal Scream's Duffy.
He confirmed: "Recording our first album is pencilled in the diary."