Kevin Mazur/WireImage.com

Someone's making sweet music with Kate Hudson—and it's not Lance Armstrong!

The Oscar nominee has joined the cast of director Rob Marshall's movie adaptation of the hit Broadway musical Nine.

And get this: Hudson's role, an American writer for Vogue named Stephanie, wasn't even in the original Broadway show. Marshall & Co. created it just for her!

And what a cast she's joining...

The movie will star Daniel Day-Lewis as world-famous film director Guido Contini, who must balance the women in his life while making his latest movie. Nine was inspired by Federico Fellini's autobiographical film 8 ½.

The stellar ensemble playing Guido's many ladies include Nicole Kidman, Penélope Cruz, Marion Cotillard, Judi Dench and Sophia Loren.

"[Hudson's] revelatory skills as a singer and a dancer lead to the creation of the role," Marshall said in a statement released earlier today.

Composer Maury Yeston has even written a new song just for Hudson.

Marshall is still looking for his Saraghina, a woman described as a "whore from Guido's youth."

Nine has hit a couple of sour notes along the way. Javier Bardem had originally signed on as Guido, but dropped out in May, citing exhaustion from his work in the last year and an awards season that was capped off with an Oscar for his work in No Country for Old Men.

Catherine Zeta-Jones also ditched playing Guido's film muse Claudia, because she reportedly felt her part wasn't substantial enough. The role eventually went to Kidman after Marshall, who directed Zeta-Jones in her Academy Award-winning performance in Chicago, declined to make enough changes to satisfy Zeta-Jones.

Nine first opened on Broadway in 1982 with Raul Julia in the lead role. In 2003, a hit revival starred Antonio Banderas.

A rep for the Weinstein Company says filming is scheduled to begin in October in London.