"Walk Hard" Debut

Actor John C. Reilly, third from left, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," performs with his band on the back of a truck at the premiere of the film at Grauman's Chinese Theatre in Los Angeles on Dec. 12, 2007. The movie opens Dec. 21.

Actor John C. Reilly, left, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," performs at the premiere of the film in Los Angeles on Dec. 12, 2007.

John C. Reilly, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," is on his knees before fellow cast member Jenna Fischer at the premiere of the film in Los Angeles on Dec. 12, 2007.

Here's Reilly on his knees again, this time before comedienne Molly Shannon. They're at the premiere of Sony Pictures' "Walk Hard: The Dewy Cox Story" in Los Angeles on Dec. 12, 2007.

Actress Jenna Fischer, a cast member in "Walk Hard: The Dewey Cox Story," waves to fans as she arrives at the film's premiere in Los Angeles on Dec. 12, 2007.

Jake Kasdan, left, co-writer and director of "Walk Hard: The Dewey Cox Story," poses with fellow co-writer and producer Judd Apatow at the premiere of the film in Los Angeles on Dec. 12, 2007.

Actor John C. Reilly, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," performs with his band on the back of a truck at the premiere of the film at Grauman's Chinese Theatre in Los Angeles on Dec. 12, 2007.

"High School Musical" stars Zac Efron, left, and Vanessa Hudgens pose with singer John Mayer at a party at The Social Hollywood Club after the premiere of "Walk Hard: The Dewy Cox Story" on Dec. 12, 2007.

Musician John Mayer arrives at the premiere of the film "Walk Hard: The Dewey Cox Story" in Los Angeles on Dec. 12, 2007.

Actor John C. Reilly, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," performs at the premiere of the film in Los Angeles on Dec. 12, 2007.

Actor Seth Rogen arrives with his girlfriend, Lauren Miller, for the premiere of the film "Walk Hard: The Dewey Cox Story," in Los Angeles on Dec. 12, 2007.

Justin Long, left, a cast member in "Walk Hard: The Dewey Cox Story," poses with actor Jonah Hill at the premiere of the film in Los Angeles on Dec. 12, 2007.

John C. Reilly, who stars as musician Dewey Cox in "Walk Hard: The Dewey Cox Story," strikes a rock-star pose at the premiere of the film in Los Angeles on Dec. 12, 2007.

Actor John C. Reilly, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," shares a laugh with fellow cast member Jenna Fischer at the premiere of the film in Los Angeles on Dec. 12, 2007.

Actors Will Ferrell and John C. Reilly chat at the party at The Social Hollywood Club after the premiere of Sony Pictures' "Walk Hard: The Dewey Cox Story" in Los Angeles on Dec. 12, 2007.

Actors Jack Black and Tanya Haden arrive at the premiere of Sony Pictures' "Walk Hard: The Dewey Cox Story" on Dec. 12, 2007, at Grauman's Chinese Theatre in Los Angeles.

John C. Reilly and TV star David Krumholtz pose at the party at The Social Hollywood Club after the premiere of "Walk Hard: The Dewey Cox Story" in Los Angeles on Dec. 12, 2007.

Actor Will Ferrell poses with his wife, Viveca Paulin, at the party at The Social Hollywood Club after the premiere of Sony Pictures' "Walk Hard: The Dewey Cox Story" in Los Angeles on Dec. 12, 2007.

Actress Rachelle Carson and actor Ed Begley Jr. attend the premiere of "Walk Hard: The Dewey Cox Story" at Grauman's Chinese Theatre in Los Angeles on Dec. 12, 2007.

John C. Reilly, who plays musician Dewey Cox in "Walk Hard: The Dewey Cox Story," poses on the red carpet at the premiere of the film in Los Angeles on Dec. 12, 2007.