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