Celtic secure Nouioui deal
The 26-year-old is the most recent addition to Neil Lennon's squad, following the arrival of defender Efe Ambrose, striker Nicolas Fedor and goalkeeper Lubos Kamenar.
Nouioui, who spent the last three years with Spanish side Deportivo La Coruna, told the club's website: "I'm absolutely delighted to sign for Celtic.
"I know that Celtic already has a great squad of players and I'm very much looking forward to joining up with my team-mates. And I hope to play my part in bringing success to the club.
"And, of course, I'm also looking to competing in the Champions League with such a great football club."