#3: Shannen Doherty as Brenda Walsh
Shannen Doherty played Brenda Walsh, Brandon’s spirited twin sister. Smart, stubborn, and passionate, Brenda quickly became one of 90210’s most talked-about characters — especially during her fiery romance with Dylan McKay. Her mix of vulnerability and confidence helped define the show’s early seasons and made her a ’90s icon.

Before joining 90210, Doherty had already appeared in Little House on the Prairie and Heathers. But it was Brenda that made her a star, sparking both massive fan devotion and constant media attention throughout the show’s early years.
