Shannen Doherty Crohn's disease_Achieving her huge breakthrough in 1990 by landing the role of Brenda Walsh in the TV show ‘Beverly Hills 90210’, she enjoyed superstardom for four years. Known for her violent behavior off-screen – including physical altercations at nightclubs with other celebrities and regular party-goers – producers of ‘90210’ felt she wasn’t a proper representative of the show and fired her after the fourth season.