Will Quentin Tarantino voice Brainy Smurf? Quentin Tarantino has reportedly been cast to voice Brainy Smurf in the upcoming Smurfs movie. Speaking to MTV, Alan Cumming revealed that the Inglourious Basterds director had been tapped for the role. A publicist for Tarantino has since denied the filmmaker’s involvement with the project. Other names attached to the live-action/CGI hybrid include Katy Perry, George Lopez and Neil Patrick Harris.