We'd be surprised if any teenage girl made it through the '90s without developing a crush on Beverly Hills, 90210's Jason Priestley. No real-life high school boyfriend could hold a candle to Priestley's character, the clean-cut Midwestern transplant Brandon Walsh (twin brother to the more rebellious Brenda, played by Shannen Doherty -- whom he dated in real life). The Canadian actor was 21 when he landed his breakthrough role on 90210. A year later, in 1991, he was named one of the world's most beautiful people by People magazine. Brandon left Beverly Hills in 1998 to pursue a newspaper job in Washington, D.C., while Priestley left the show to pursue other acting and directing jobs.