In 1985, aged 20, Morandini became the youngest TV speaker of France. He worked for channel La Cinq, before creating and animating the programme Tout est possible on TF1 for 4 years (1993–1997). The programme was sharply criticised for its lack of intelligence, particularly by Libération and Les Guignols de l'Info, and was eventually discontinued.
Morandini then turned to radio, working for RMC Info and, since 2003, for Europe 1.
On the 12 April 2007, Morandini started a small scandal from his blog, where he stated his intentions to publish estimations of results of the presidential election as soon as 18h ; according the French applicable laws (loi électorale du 19 février 2002), the results cannot be announced before 20h00. For years, media from neighbouring Belgium and Switzerland have broadcast programmes in French where estimations of the results are given before the official hour.