It's Not Me, It's Him(1980)

It's Not Me, It's Him is a French comedy built on mistaken identity and romantic chaos. Pierre Renard, assistant to writer George Vallier, is confused for his boss by Italian actor Aldo Barazutti at a party. Barazutti convinces Pierre to join him in Tunisia under the pretense of developing a screenplay—but his real plan is to escape his wife and reunite with his mistress Valerie. When Vallier arrives and discovers the deception, the trio finds themselves fleeing across the desert from an enraged husband. What follows is a farcical adventure fueled by misunderstandings, mistaken identities, and the collision of three men's conflicting agendas in an exotic setting.