There’s no denying that Judd Apatow has had an amazing year with the successes of Knocked Up and Superbad. And it looks like he’s poised to finish off the year on another high note with Walk Hard: The Dewey Cox Story, which Apatow co-wrote and produced. Walk Hard is a spoof on the big musician biopics like Ray and Walk the Line, telling the story of the rise and fall of the great (and fictional) Dewey Cox.

Cox is played by John C. Reilly, whose comedic skills are often underused and underestimated, so I’m thrilled to see him in a movie like this. And as he proved in Chicago, he can sing, so the many hits of Dewey Cox will be ably performed. The rest of the cast is rounded out with some impressive comedic talents, such as SNL’s Kristen Wiig as Cox’s shrill shrew of a wife who just doesn’t “get” his need to perform and The Office’s Jenna Fisher as a June Carter-like character who catches Cox’s eye. Then there’s the plethora of cameos, ranging from the White Stripe’s Jack White as Elvis, to Apatow regular Paul Rudd as John Lennon, to Frankie Muniz as Buddy Holly.

I’m wavering between seeing it and renting it, and right now I’m more likely to RENT IT. That way I can juvenilely snicker at all the tongue-in-cheek uses of the word “Cox” from the privacy of my own home.

Walk Hard is not yet rated and opens December 21. (Official site)