A toddler has been forced to drink beer and smoke marijuana by her teenage parents, video allegedly shows.

The girl is seen swaying while someone off camera puts a beer bottle to her mouth ready for her to drink.

She appears to almost fall over and pass out as her mum catches her, The Mirror reports.

Video shows the toddler smoke what appears to be a joint or cigarette and then sip some beer from a bottle.

Video allegedly shows the girl smoking and drinking what appears to be alcohol. More

The parents can be heard laughing in the background of the video.

The mother, 17, and father, 18, were arrested at their home in Formosa in Argentina after the video did the rounds on social media.

The toddler's parents claimed the video was made as a joke and that the girl wasn't given any illegal substances.

Staff from the Police Investigation Brigade, the Secretariat of the Ministry of Childhood and authorities of the Juvenile Prosecutor's Office intervened and took the child away from the parents.

People expressed their horror at the video with many saying the parents "deserve the worst" and "they aren't parents".