 Actress Shannon Dougherty, best known for her roles on TV's original Beverly Hills 90210 and Charmed, died after a years-long battle with cancer. Shannon Dougherty got her start in Hollywood as a child actress. But it was in 1990 that Dougherty became a household name, playing Brenda Walsh in Beverly Hills 90210. I don't know, everyone says he's a tremble. And in 1998, playing Prue Hollowell in Charmed.