Also in 2015, Thiessen started hosting her own show on Cooking Channel called Dinner at Tiffani's. On June 7, 2017, Thiessen was cast as Lori Mendoza, mother of the Mendoza family on the multi camera Netflix sitcom Alexa & Katie, which premiered its first two seasons on March 23 and December 26, 2018.Thiessen served as maid of honor at 90210 co-star and best friend Jennie Garth's 2001 wedding to actor Peter Facinelli, with whom she co-starred on Fastlane.Tiffani was raised with her family and has had huge support from her family to pursue her acting and modeling career..
Simultaneously, Thiessen guest starred on series such as Married... In 1992, she starred in her first television movies Saved by the Bell: Hawaiian Style and A Killer Among Friends, making her film debut in Son in Law in 1993.
Todd Thiessen and Schuyler Thiessen are her two siblings.