FILLION_NATHANEXCLUSIVE: CAA has signed Nathan Fillion, who is now into the sixth season of headlining the hit ABC series Castle. He’s won two People’s Choice awards for his role as Richard Castle. Fillion, who previously starred in Joss Whedon’s Firefly, also starred in Percy Jackson: Sea Of Monsters, as well as the Whedon-directed Much Ado About Nothing. Fillion had been repped at ICM, and his attorney continues to be Jamie Mandelbaum of Jackoway Tyerman Wertheimer.