He began his theater journey at Ibn-Charaf High School, under the guidance of his teacher Hamadi Mezzi, performing classical plays. He then joined amateur theater and enrolled in the Higher Institute of Dramatic Arts in Tunis, where he successfully obtained a diploma in 1986. On October 7, 2011, he was appointed as the President of the Hammamet International Festival and held this position until March 31, 2014. In 2013, Fethi Haddaoui received the award for Best Actor and the Ramadan Star award at the Romdhane Awards presented by Mosaïque FM. He also received the Best Actor award for his role in "Naouret El Hawa" at the Romdhane Awards in 2014.