Thiessen is best known for her roles on "What About Brian," "Beverly Hills, 90210" and "Saved by the Bell."
Bronwen Hughes is set to direct the "White Collar" pilot, starring Matthew Bomer and Tim DeKay as a con artist and FBI agent who form an unlikely partnership. Thiessen will play Elizabeth, a "very grounded, intelligent accountant, who also happens to be the wife of FBI Agent Peter Stokes (played by DeKay.)"
The casting announcement was made Tuesday by Jackie de Crinis, USA's executive vice president of original scripted programming.
"Tiffani will be such an amazing addition to 'White Collar,'" de Crinis said in a statement. "She brings a beauty and warmth to this role that really makes the character come alive."