Charlie Gilmour, son of Pink Floyd star David Gilmour, has been charged with violent disorder linked to an attack on a convoy carrying the Prince of Wales and Duchess of Cornwall in London.
The Royals' vehicle was targeted during a tuition fee protest on 9 December.
Mr Gilmour, 21, of Billingshurst, Sussex, had already been charged with violent disorder over a separate alleged incident on the same day.
A charge he faced of stealing a mannequin leg was withdrawn.
Mr Gilmour allegedly sat on the bonnet of a car carrying Royal protection officers in Regent Street, central London.
The vehicle was part of a three-car convoy taking the couple to the Royal Variety performance at the London Palladium nearby.
Mr Gilmour is also alleged to have thrown a rubbish bin at the convoy, hitting a car, but not the one containing the Royals.
He did not indicate a plea when he appeared before City of Westminster Magistrates' Court.
The case was adjourned until 25 March.