The Critics' Choice Movie Award for Best Actor is an award given out at the annual Critics' Choice Movie Awards. The awards are presented by the Critics Choice Association (CCA) and was first presented in 1995. There were no official nominees announced until 2001. Actors Russell Crowe and Daniel Day-Lewis hold the record for most wins in this category with three victories each, followed by Jack Nicholson and Sean Penn with two wins each.

Paul Edward Valentine Giamatti is an American actor. His accolades include a Primetime Emmy Award and three Golden Globes, as well as nominations for two Academy Awards and a British Academy Film Award.