Kelsey Grammer and Kevin Costner have been sued over their new film Swing Vote, TMZ reports.

Screenwriter Bradley Blakeman, a former aide to President George W. Bush, filed suit in New York on Thursday claiming the movie, which opens in theaters today, was based on his script Go November-which he says he sent to Grammer “in confidence” in Spring 2006.

“I am not sure why Kelsey was even named in this suit. He was an actor who signed on to the project after the script was written,” says Grammer’s rep Stan Rosenfield.