Kelly Kapowski (Tiffani Thiessen)
Tiffani-Amber Thiessen (she later dropped the Amber) played the popular cheerleader at Bayside, but made the move to a much more seductive ZIP code, "90210," to play manipulative vixen Valerie Malone. Thiessen and co-star Brian Austin Green began a seven-year romance before Thiessen left the series in 1998. In addition to a memorable role as Honey DeLune opposite Tim Meadows in 2000's "The Ladies Man," the bright-eyed brunette played Billie on the short-lived series "Fastlane." Her most recent role on "What About Brian" was cut short when the series was canceled, but the actress recently told People magazine that she's focused on motherhood now, hoping for a baby with husband-actor Brady Smith.
(NBCU Photo Bank, via AP/Getty Images)