So much for high times.

Harry Potter star Jamie Waylett, known as bullying Hogwarts student Vincent Crabbe, was arrested on Tuesday in London on suspicion of possessing marijuana.

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According to British reports, police first stopped Waylett, 19, and a pal while they were driving and discovered eight bags of pot inside the vehicle.

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Police then raided the London-area home the actor shares with his mom (and two brothers and a sister) and found 10 plants, believed to be cannabis and valued at about $2,900.

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The plants were growing under powerful hydroponic lights beside a PlayStation, according to reports.

Waylett is due in court in July -- the same month Harry Potter and the Half-Blood Prince hits theaters.