Shannen Doherty and Spelling Television are parting company again. The actress, 30, is leaving the cast of WB's "Charmed" after three seasons, according to the Hollywood Reporter. "We have had a long and prosperous relationship with Shannen and we didn't want to hold her back from what she wanted to do," the show's producer, Spelling TV, told the trade paper's Web site. In the 1990s Doherty departed the hit Fox series "Beverly Hills, 90210" after four seasons amid reports of tension on the set. In the past, PEOPLE has reported on the actress' public brawls with boyfriends, a bar fight and her citations for thousands of dollars in unpaid back rent. Last month she pleaded no contest to charges of drunken driving, driving with a blood-alcohol level above the legal limit and refusing to submit to a chemical test after being stopped by the California Highway Patrol last December. Her sentencing is scheduled for June 12.