LONDON - ACTOR Jamie Waylett, a star of the Harry Potter film franchise, has been arrested on drug charges said reports on Wednesday.

Police alleged raided the 19-year-old's family home and discovered a cannabis farm in his bedroom reported The Sun.

Waylett - who has appeared as Hogwarts school bully Vincent Crabbe in all six Harry Potter films - had his Audi pulled over by police in London's Westminster after a tip-off.

Officers allegedly found eight bags of cannibis inside the vehicle reported news.com.au.

Waylett and a fellow occupant of the car were reportedly held at the scene before police raided the Camden home he shares with his mother and three siblings.

A hydroponic farm containing ten cannabis plants, with an estimated value of £2000 ($4151) was allegedly found beside the actor's DJ decks and a PlayStation.

A police source told The Sun: 'It was a pretty significant find. We are concerned the drugs in the car were all bagged up and ready to go.

'Work now needs to be done to establish how far down the line we are towards dealing.'

Waylett was also accused of snorting cocaine in 2006.

A friend of fellow Harry Potter stars Daniel Radcliffe, Emma Watson and Rupert Grint, Waylett will next appear in the soon to be released Harry Potter and the Half-Blood Prince.