You’ve probably never heard of legendary musician Dewey Cox. But that’s probably because he never really existed. That didn’t stop Judd Apatow and Jake Kasdan from making a movie about his life however. “Walk Hard,” starring John C. Reilly and Jenna Fischer, will skewer the musical biopic genre via the life of a fictitious country-folkie from his humble beginnings to mega rock god. But the kinds of true-to-life stories portrayed in films like “Walk the Line” and “Ray” aren’t so uncommon. In fact, there are a ton more in production. Here’s a closer look at some of what’s on tap:

“” — The recently-announced film adaptation of the story of 1970s all-girl rockers the Runaways will be written and directed by music video director Floria Sigismondi. Producers Art and John Lindson (“Lords of Dogtown”) have secured the rights to use the Runaways’ music, which launched the careers of Lita Ford and Joan Jett, the latter of whom will serve as one of the film’s executive producers. The story is based on an unpublished memoir by frontwoman Cherie Curry.

— Kirsten Dunst has been selected by Debbie Harry to star in the upcoming film adaptation of her life. “Debbie chose me for this role,” Dunst told Reuters, “so anyone who disputes this can take it up with her.” No script is yet in place, and no director has been announced, though Michel Gondry has been listed as a frontrunner.

“The Dirt” — Vince Neil told ABC News that Christopher Walken will play Ozzy and Val Kilmer will play David Lee Roth in this adaptation of Neil Strauss’ Motley Crue biography. No casting has been made official though, neither has a director, though Larry Charles (“Borat”) has been rumored to be attached.

“Control” — The feature film debut from video director Anton Corbijn is the story of Joy Division’s Ian Curtis, who committed suicide at age 23. Sam Riley (“24 Hour Party People”) will take on the role of Curtis, and Samantha Morton will play his widow Deborah Curtis, whose book “Touching From a Distance” the film is based on. It will be shot in black and white.

“The Gospel According to Janis” — In a recent interview with VH1, Zooey Deschanel, who has been cast as Janis Joplin in the film, said the Penelope Spheeris-directed biopic is currently on hold: “I don’t know when we’re going to start shooting. We were supposed to shoot in November, but it’s one of these things [that] seems like it’s been hard to get all the money and the rights in place.” Rather than focusing on Joplin’s tragic life (she OD’d at 27), the film will celebrate it. “The script makes this day a microcosm for the rest of her life,” Deschanel said. “It’s a sort of microscope rather than a general overview.”

“Mystery White Boy” — Mary Guiden, Jeff Buckley’s mother, who for years attempted to quell any film projects about her son’s life, is overseeing this biopic, which is currently being produced by Michelle Sy (“Finding Neverland”) and written by Brian Jun. The film will focus predominantly on Buckley’s career, including the recording of “Grace” and his mysterious drowning death at age 30. No actors have been cast, which Guiden has said won’t happen until the script is completed.

— Jeff Nathanson (“Rush Hour 2″) will write and direct the story of Rob Pilatus and Fab Morvan, the lip-synching, Grammy-winning duo who experienced one of pop music’s most amazing rises and subsequent falls. No one has yet been cast, though Nathanson has secured the cooperation of Morvan and the estate of Pilatus, who overdosed in 1998. “I’ve always been fascinated by the notion of fakes and frauds,” Nathanson told Variety. “And in this case, you had guys who pulled off the ultimate con, selling 30 million singles and 11 million albums and then becoming the biggest laughing-stocks of pop entertainment.”

“I’m Not There” — A slew of actors, including Christian Bale, Richard Gere and Cate Blanchett, will all play a different phase of Bob Dylan’s life in Todd Haynes’ upcoming indie flick, which will debut at Cannes. The film is said to take a non-traditional approach to storytelling, much the way the songwriter approached his material. The film also features Julianne Moore, Adrien Brody and David Cross.

“Finding t.A.T.u” — A loose biopic starring the Russian pop stars as themselves, the film is based on the book “t.A.T.u. Come Back” by Aleksey Mitrofanov, a Russian politician. The story follows two girls, who, after attending a t.A.T.u concert, become obsessed with the pop group (and each other), and who, in a drug-fueled delerium end up murdering one of their mothers.

— “I love the idea of there being a movie on my life, and I can’t wait to see the script,” Beach Boy Brian Wilson said of the upcoming film about his life. Director David Leaf (“The People vs. John Lennon”) is slated to direct the film which will tackle a wide berth, from his career with the Beach Boys to his battles with mental illness.

There are also a pair of competing Miles Davis flicks says a recent New York Times piece. “Miles and Me” is based on the book by Quincy Troupe. “You’ll see a film that approaches the inner life of Miles Davis,” said producer Rudy Langlais. “We’re aiming for the truths of Miles — his fears, his terrors, his demons.” Meanwhile, Don Cheadle has been rumored to be attached to a rival film in development by Davis’ estate, though Cheadle’s reps have denied those rumors.

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