She later guest-starred in the sitcom Two Guys and a Girl and the short-lived action show Fastlane, as well as guest-starring on Just Shoot Me!. Her transition to film has not gone well so far, as most of her movies have been critically panned. In 2002, she appeared in the film Hollywood Ending directed by Woody Allen.
In 2005, she released a short (21 minute) film she had directed called Just Pray. It placed at several film festivals and was the first major effort from her new production company, Tit 4 Tat Productions.
In January 2007 Thiessen joined the cast of ABC's relationship drama What About Brian, playing the boss of Brian, and a potential love interest for Adam. However, in May 2007 ABC officially canceled the series.
In March of 1999, her then-boyfriend, actor David Strickland, committed suicide. From October 2001 to April 2003, she was engaged to actor Richard Ruccolo, whom she had met during the Two Guys and a Girl run. On July 9, 2005, she married actor Brady Smith in Montecito, California.
|1989||Saved by the Bell||Kelly Kapowski||TV series (she played in 1989-1993)|
|1992||Saved by the Bell: Hawaiian Style||Kelly Kapowski||TV movie|
|A Killer Among Friends||Jenny Monroe||TV movie|
|1993||Son in Law||Tracy||Film|
|1993||Saved by the Bell: The College Years||Kelly Kapowski||TV series (1993-1994)|
|1994||Saved by the Bell: Wedding in Las Vegas||Kelly Kapowski||TV movie|
|Beverly Hills, 90210||Valerie Malone||TV series (she played in 1994-1998)|
|1995||The Stranger Beside Me||Jennifer Gallagher||TV movie|
|She Fought Alone||Caitlin Rose||TV movie|
|1996||Sweet Dreams||Alison Sullivan||TV movie|
|Buried Secrets||Annalisse Vellum||TV movie (and co-producer)|
|1999||Speedway Junky||Wilma Price||Film|
|From Dusk Till Dawn 2: Texas Blood Money||Pam||Film|
|Love Stinks||Rebecca Melini/Juliette||Film|
|2000||Ivans XTC||Marie Stein||Film|
|The Ladies Man||Honey DeLune||Film|
|Shriek If You Know What I Did Last Friday the Thirteenth||Hagitha Utslay||Film|
|2001||Everything But the Girl||Denise||TV movie|
|2001||A Christmas Adventure from a Book Called Wisely's Tales||Vixen (voice)||Animated film|
|2002||Hollywood Ending||Sharon Bates||Film|
|2002||Fastlane||Wilhelmina 'Billie' Chambers||TV series (2002-2003)|
|2005||Just Pray||-||Short film (co-producer only)|
|2006||Stroller Wars||Lainey||TV series|
|2007||Pandemic||Kayla Martin||TV movie|
|What About Brian||Natasha Drew||TV series|
|2008||Cyborg Soldier||Lindsey Reardon||Film|
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