Overture Films' spy thriller Traitor, which begins filming in Toronto with writer/director Jeffrey Nachmanoff gets added boost from Jeff Daniels who joins Don Cheadle and Guy Pearce in the cast.

Neal McDonough, Archie Panjabi, Alyy Kahn and Said Taghmaoui also star in the tale of a rogue operative who helps terrorists, although his motives are unclear.

Overture Films finances and keeps domestic rights.

Paramount Vantage International will handle international sales and handle at Toronto festival.

Jeffrey Nachmanoff, writer of The Day After Tomorrow, directs from his own script. Cheadle, David Hoberman, Todd Lieberman and Jeffrey Silver are producing with Ashok Amritraj, Steve Martin, Arlene Gibbs, and Kay Liberman serve as executive producers.

Traitor, the sixth film announced by Overture in six months, joins their roster alongside Righteous Kill with Robert De Niro and Al Pacino, Last Chance Harvey with Dustin Hoffman and Emma Thompson, and Ferris Wheel starring Charlize Theron.

In development are 105 Degrees And Rising and Mad Money, due for North American release Jan 25, 2008.