Two aboard cable pilots

Tiffani Thiessen, Matthew Marsden join projects

Tiffani Thiessen has been tapped to co-star on USA Network's pilot "White Collar," while Matthew Marsden has landed the title role on Spike TV's two-hour pilot "Madso's War."

"Collar," from Fox TV Studios, centers on Neal (Matthew Bomer), a brilliant con artist who partners against his will with Peter (Tim DeKay), the head of the FBI's white-collar crime unit. Thiessen will play Debbie, Peter's intelligent and supportive wife who works as an accountant.

"Beverly Hills, 90210" alumna Thiessen is repped by Paradigm and manager Jai Khanna.

"War," from MGM TV, revolves around the Irish mob in Boston. Marsden plays Mike "Madso" Madden, a small-time thief with connections to the Boston rackets who tries to walk away when two guys on his crew are murdered -- but soon realizes he's next on the hit list. Also cast is Kevin Chapman ("Brotherhood").

Marsden, who just wrapped production on "Transformers: Revenge of the Fallen," is repped by Innovative and Mosaic. Chapman is with TalentWorks and Ellen Meyer Management.