The Tunisia forward has a agreed to a two-year deal at Celtic Park, subject to international clearance.
"I'm absolutely delighted to sign for Celtic. I hope to play my part in bringing success to the club," he told the Hoops' official website.
"Celtic is a huge club with a magnificent history and a fantastic support. I know all about the wonderful atmosphere at Celtic Park and I can't wait to play there.
"I know that Celtic already has a great squad of players and I'm very much looking forward to joining up with my teammates."