Asterix the Gaul is a 1967 BelgianFrench animated film, based on the comic book of the same name, which was the first book in the highly popular comic series Asterix by Goscinny and Uderzo. The film sticks to the books plot very closely.
After a brief introduction to the principal characters, the film follows Asterix as he encounters a group of Roman legionaries in the forest. Despite being significantly outnumbered, Asterix leaves the Romans beaten and bruised for daring to interrupt his wild boar hunt. Their state upon their return to camp prompts the leader Phonus Balonus to seek the secret behind the Gauls seemingly superhuman strength. Phonus selects a volunteer by means of a single round of musical chairs to pose as a Gaul in order to infiltrate the village the unlucky loser is a short, slacktongued misfit named Caligula Minus. He is dressed in a wig, false moustache and traditional Gaulish dress and led in chains through the forest as a prisoner, awaiting rescue by the Gauls. Sure enough, Asterix and Obelix free Minus and believe his flimsy cover story that he is a Gaul from Belgium.Once inside the Gaulish village, Minus goads Asterix into sharing the secret of the magic potion with him he goes on to use the same tactic against Getafix in order to try the potion for himself. Before he has a chance to steal some of the potion to take back to the Roman camp, Minus cover is blown during a traditional dance Asterix pulls off Minus moustache. Still empowered by the magic potion, Minus makes good his escape, with the Gauls powerless to stop him. ........
Source: Wikipedia