A teenage thug faces being locked up after admitting to a stabbing in front of horrified customers in a fast food restaurant.

Aiden St Louis, of Lewis Crescent, Cliftonville, pleaded guilty to wounding with intent to cause grievous bodily harm and having an offensive weapon when he appeared at Maidstone Crown Court today.

The 18-year-old stabbed the victim in McDonald’s in New Road, Gravesend, in the early hours of July 16.

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The attack was captured on a mobile phone and widely shared on social media.

St Louis stamped on his victim before lashing out with the knife. Other diners were begging him to stop.

VIDEO: Aiden St Louis stabbed his victim inside Gravesend McDonald's

The victim was taken to a London hospital with a wound to his arm. He needed surgery to repair a muscle.

The court heard he had not supported the prosecution.

Two other men are wanted in connection with the incident. One is known to police but the second has not been identified.

“There is a history of much lower level violence and this attack appears to have been at a level which leads me to think his risk must be assessed,” said Judge Charles Macdonald QC.

St Louis was remanded in custody for reports to assess dangerousness and he will be sentenced on October 9.