Going from all-American teenage superstar to respected, grown-up working actress, Tiffani Thiessen never lost the affection she earned from fans with her breakthrough role as Kelly Kapowski on "Saved by the Bell" (NBC, 1989-1993). The endearingly cheesy Saturday-morning show was a phenomenon, and Tiffani-Amber Thiessen - as she was billed then - was chief among its charms as a good girl whose relationship with Zack Morris (Mark-Paul Gosselaar) became a romance for the Gen-X ages. Easily stretching to play the devious vixen Valerie Malone, Thiessen revitalized a post-Shannen Doherty "Beverly Hills, 90210" (FOX, 1990-2000). She also starred in a string of made-for-TV movies and brought her next-generation-Heather-Locklear touch to many troubled series, including "Two Guys, a Girl and a Pizza Place" (ABC, 1998-2001) and "Fastlane" (FOX, 2002-03). She worked with Woody Allen in his feature "Hollywood Ending" (2002) and settled comfortably into marriage, motherhood and a starring role on "White Collar" (USA Network, 2009- ). While she made her name as the queen of TV guilty pleasures, as an adult Thiessen proved she had talent and staying power to spare.