A teenage girl has been charged with assault after millions of people watched shocking footage of an attack on a Croydon teenager.

UPDATE: THURSDAY 11am: Guilty: 'I'm gonna smack this yute' girl admits assaulting teenage boy

The viral video, viewed more than 2,650,000 times on Facebook, shows a girl launching a foul-mouthed tirade at a boy before repeatedly punching him in the head in a row over an apparent cannabis deal.

In the two-minute video, believed to be shot in the Monks Hill estate of South Croydon, she can be heard saying: "I'm gonna smack this yute".

MORE CROYDON STORIES »

She grabs the boy by his clothing, and tells him: "I don't want to have to bang you, you're lucky."

As the boy, who does not retaliate, backs away, she adds: "Are you gonna cry? Are you gonna cry?

She then tells him: "You better fix up, sort yourself out and when my bredrens come for a draw or anyone on this estate comes for a draw, you're not giving them dust, do you understand? Or else I'm getting my youngies to come and jerk you."

After the girl lands a blow on the boy, someone in the watching crowd is heard saying: "Oh, that was a connection".

A Metropolitan Police spokesman said the force had been made aware of the footage on May 14.

A 15-year-old girl was charged with assault by beating on May 16 and will appear at Croydon Magistrates' Court on May 21.