Jamie Waylett plays Draco Malfoy's right-hand man in the Potter films
A Harry Potter actor has admitted growing cannabis in his mother's north-west London home.
Jamie Waylett, 19, who plays bully Vincent Crabbe in the film series, pleaded guilty to growing 10 cannabis plants in tents at the Kilburn house.
The court heard police found shots of the plants on Mr Waylett's camera after he was arrested for taking a picture of officers as he and a friend drove past.
He is due to re-appear before City of Westminster magistrates on 21 July.
The images found on the camera led police to search Mr Waylett's mother's home where they found the 10 cannabis plants.
Officers had previously searched the car belonging to his friend, John Innis, 20.
There they discovered a knife and eight bags of cannabis, and later found another three bags of cannabis in Mr Innis's possession.
During the hearing, Mr Innis, from Barnet, north London, admitted possession of a knife and having 11 bags of cannabis.
Chief magistrate Timothy Workman said: "Clearly the possession of cannabis is a serious matter and indeed the possession of knives is serious as well.
"At the moment I'm not giving you any promises as to how the court will deal with this case (on 21 July)."
Defending, Cheryl Rudden said Waylett had been videoing the road side for a music compilation when he caught the attention of officers.
Ms Rudden told the court: "There are possibly issues as to his future in his field so far."
Mr Waylett played a sidekick of villain Draco Malfoy in the Harry Potter films.
The latest instalment in the series, Harry Potter and the Half-Blood Prince, went on general release on Wednesday.