In "Talladega Nights: The Ballad of Ricky Bobby", who plays the best friend?

"Talladega Nights: The Ballad of Ricky Bobby" is a 2006 American sports comedy film directed by Adam McKay and starring Will Ferrell, written by both McKay and Ferrell. Other actors include John C. Reilly, Sacha Baron Cohen, Gary Cole, Michael Clarke Duncan, Leslie Bibb, Jane Lynch, and Amy Adams, and appearances by Saturday Night Live alumni. NASCAR drivers Jamie McMurray and Dale Earnhardt Jr. have cameos, as do broadcasting teams from NASCAR on Fox (Mike Joy, Larry McReynolds and Darrell Waltrip) and NASCAR on NBC (Bill Weber, Wally Dallenbach Jr. and Benny Parsons).

Will Ferrell plays Ricky Bobby, a NASCAR driver who only believes in winning throughout his career. John C. Reilly plays Cal Naughton Jr., Bobby's best friend and teammate.