Les Visiteurs (French pronunciation: [le vizitœʁ]; English: The Visitors) is a 1993 French fantasy comedy film directed by Jean-Marie Poiré. It stars the duo of Christian Clavier and Jean Reno, and Valérie Lemercier. It also features Marie-Anne Chazel, Christian Bujeau, Isabelle Nanty and Didier Pain in supporting roles. In the film, a 12th-century knight and his squire travel in time to the end of the 20th century and find themselves adrift in modern society.

Les Visiteurs was the highest-grossing film in France in 1993 and remains one of the highest-grossing films in the country today. The publicity for the film used the tagline Ils ne sont pas nés d'hier ("They weren't born yesterday"). After its box office success, the film was nominated eight times for the 19th César Awards. It won the César for Best Supporting Actress, awarded to Valérie Lemercier. The success of the film and its cliffhanger ending led to a sequel, The Visitors 2: The Corridors of Time, which was itself followed by a third film, The Visitors: Bastille Day, forming a trilogy, entirely produced by Jean-Marie Poiré. The film also has an English-language remake Just Visiting. The castle of Ermenonville in the Oise département served as the set for the castle of Montmirail in the modern day and the Cité de Carcassonne for the medieval castle.

In the year 1123, King Louis VI, known also as Louis the Fat, is on a romantic escapade with the niece of the King of England. One of his vassals, Count Godefroy de Montmirail, nicknamed "the Bold", guards their meeting place. Having to flee from incoming enemy troops, Louis VI finds himself faced with an English soldier who seeks to capture him. The Count then saves his king's life by killing the English soldier. As a reward, Godefroy is promised to be married to his long-time beloved, Frénégonde de Pouilles, the daughter of Duke Fulbert de Pouilles. The Count sets out towards his castle where the wedding is set to take place. He is accompanied by his men and his faithful squire, Jacquouille la Fripouille. Along the way, they capture a witch living in a forest. They imprison her in a cage with the aim of bringing her to the inquisition afterwards.

Arriving near the castle, Godefroy changes outfits to present himself to his newly betrothed Frénégonde. Frénégonde is informed of the arrival of Godefroy and runs out of the castle to join him, pursued by her father who tries to restrain her eagerness. Taking advantage of a moment of inattention on the part of her jailers, the witch pours a potion into Godefroy's gourd, which Godefroy drinks shortly afterwards. He starts seeing hallucinations: he sees the castle distorting and his men with animal faces. When Godefroy sees his bride running across the fields, the potion makes him believe she is being chased by a bear, when it is in fact her father the Duke de Pouilles who is running behind her. Godefroy grabs his crossbow to protect Frénégonde and he kills his future father-in-law with a crossbow bolt to the head.

While the occupants of the castle gather in a chapel near the remains of the Duke, Frénégonde takes an oath to retire to a convent for the rest of her life: she says she cannot marry the man who killed her father. Jacquouille, who was busy keeping the flies away from the dead body, takes advantage of everyone else's departure to steal the Duke's heavy gold necklace, set with precious stones. He hides it behind the office in the hollow head of a statue.

Godefroy travels to the mage Eusæbius, a man versed in the magic of time, in order to repair his mistake and ensure he can create a lasting lineage with Frénégonde. The mage concocts a potion for Godefroy to send him back to the past shortly before the accident. The Count makes Jacquouille taste the potion, to make sure it is not poisoned, then drinks it himself. Eusæbius recites the magic formula and Godefroy and Jacquouille disappear together. The first is transformed into a crystal statue, the second into a pile of excrement. The mage then realizes that he has forgotten the quail eggs in the potion, an essential ingredient, and declares in alarm that "it's a catastrophe".

Jacquouille and Godefroy wake up in a wood that they do not recognize as the woods of Montmirail. While Godefroy finds trash in a pond, Jacquouille goes further and discovers an asphalt road. A Renault 4 car belonging to the French postal service arrives and brakes suddenly in front of Jacquouille, who is stunned when he sees the machine. The squire begins to hit the car and the postman, who is Black, gets out of the vehicle to complain. Jacquouille, frightened, runs back to the woods to warn his master of the presence of a "Saracen". While the postman is putting the sheet metal of his car back in place, he sees the two medieval men approaching him, with a menacing look. Godefroy throws at the car and the postman runs away while the two travelers conscientiously destroy the vehicle.

As Godefroy finds and rides a horse, followed by his squire, they steal food from a restaurant. They meet Ginette Sarcley, an eccentric homeless person who lives nearby. She receives a few coins in exchange for her leaving them. Not understanding their attire or their actions, she thinks they are in the "show business" and starts singing. After a scuffle with the restaurant manager who threatens them with a gun, Godefroy flees on horseback and loses sight of Jacquouille who leaves with Ginette in the opposite direction.