Madonna's son Rocco Ritchie has been arrested after being caught with drugs.
The 16-year-old was found with cannabis in his rucksack after neighbours made complaints about his bad behaviour.
The troubled teen was spotting "smoking or doing drugs" in their posh neighbourhood.
He’s been repeatedly seen acting suspiciously
Sources said that the police were alerted when Rocco and his pals were spotted sat on a wall.
As they approached him, he was seen tossing something away and then officers noticed traces of cannabis on his clothes.
It happened in Primrose Hill, just two miles from his dad's home in Fitzrovia.
Last night a source said: “Rocco has become a well-known figure in the neighbourhood and not for the right reasons. He’s been repeatedly seen acting suspiciously.
“This incident was the final straw. Local residents are fed up with him acting in this manner and called the police.”
The youngster won't get a criminal record for the offence but a record will be kept.
Last night a Scotland Yard spokesman said: “A 16-year-old has been arrested for possession of cannabis. He was bailed and dealt with by Camden Borough’s Youth Offending Team.”
The son of Guy Ritchie and Madonna has recently been involved in a bitter custody battle between his famous parents.
The feud started in December last year after Rocco stayed in London with his dad and had refused to travel with Madonna after she had finished the UK leg of her tour.
She then launched legal action and demanded her son, then 15, be returned to her.
In March of this year, a lawyer for Rocco said that the legal fight was causing him stress.
A month later, The Sun revealed photos of Rocco puffing on what looked like a very suspicious-looking cigarette underneath London's Festival Pier on the Thames.
His relationship with his mum has now improved and his parents agreed that he would stay with Guy but spend regular time in the US.