A former youth Olympic ambassador has been detained for two years for her part in the London riots.
Chelsea Ives, 18, admitted violent disorder, burglary and criminal damage on August 7 and 8.
She was sentenced to two years in a young offenders' institution, an official at Wood Green Crown Court in north London said.
The teenager, from Leytonstone, east London, is a former Waltham Forest Council youth Olympic ambassador.
She was reported to police by her mother Adrienne Ives, who apparently saw her on TV coverage of the riots.
Her mother has said it was a hard decision but something any good parent would do.
Ives pleaded guilty to two counts of violent disorder, the first relating to her behaviour in Enfield, north London, on August 7, and the second in Hackney, east London, the following day.
She pleaded guilty to one count each of burglary and criminal damage, while two further charges of burglary will lie on file.