Benjamin Castaldi (born 28 March 1970) is a French television host, columnist, radio host and producer of Italian and Polish-Jewish descent. He is the former host of Secret Story which is a spinoff of Loft Story that he hosted as well.
Benjamin Castaldi was born into a family of artists, being the son of actress and writer Catherine Allégret and actor Jean-Pierre Castaldi. He grew up surrounded by his grandmother, actress Simone Signoret, his grandfather, director Yves Allégret, and the adoptive father of his mother, actor and singer Yves Montand. He has a half-brother, Giovanni and two half-sisters, Clementine and Paola.
In the late 1980s, Benjamin Castaldi, who then aspires to become a businessman, begins studies in economics that turn short. He then applies for a position in a home meal delivery company, where he is finally hired as a salesperson. He then becomes director of the company, which ends up filing bankruptcy. Wishing to try his luck as a music producer, he moved to the United States where he plans to relaunch the career of singer Esther Galil. But it is a new failure and in 1993, he returns to Paris penniless. Meanwhile, in 1992, he participated as an "anonymous" candidate in the game Que le meilleur gagne presented by Nagui on La Cinq.