The 19 year old, who plays bully Vincent Crabbe in the boy wizard franchise, was arrested in April (09) after police pulled over his car and caught him in possession of several bags of marijuana.
A raid on his home in Camden, north London uncovered 10 cannabis plants and he was charged with illegal production of a Class-B drug.
Waylett confessed to the crime earlier this month (Jul09) and faced up to 14 years behind bars.
But he was given a lucky break when he appeared for sentencing at London's Westminster Magistrate's Court on Tuesday morning (21Jul09) - he was handed 120 hours of community service.
Judge Timothy Workman accepted that Waylett's production had been "small scale" and had been growing the pot plants for his own use.
He also declared the actor was essentially a man of "good character" and let him off with a less severe punishment.