Frédéric Diefenthal (born 26 July 1968 in Saint-Mandé) is a French actor and director.

[3] Prior to acting, Diefenthal pursued apprenticeships in the hotel industry, hairdressing and was also an apprentice pastry chef.

He began studies in architecture before switching to drama classes.

[2] Diefenthal began acting in the early 1990s; he held a main role in the French television series Le juge est une femme (The Judge is a Woman), where he first gained a degree of notoriety.

Diefenthal was previously married to actress Gwendoline Hamon, with whom he has a son.