Actor Dan Aykroyd has joined the cast of Dog Fight for Warner Bros. and director Jay Roach.

The comedy centers on two political rivals (Will Ferrell and Zach Galifianakis), who are both vying for the same Congressional seat in a small South Carolina district. It isn't known what character Dan Aykroyd will play, but he joins a cast which also includes Jason Sudeikis, Brian Cox, Dylan McDermott, and John Lithgow.

Jay Roach is directing Dog Fight from a screenplay by Shawn Harwell and Chris Henchy. Production is currently under way in New Orleans.