All that glitters is just gonna have to wait until September.

With its star still in the hospital, 20th Century Fox announced Monday that the release date for Mariah Carey's new movie Glitter will be postponed nearly a month--from August 31 until September 21.

The troubled songbird still remains hospitalized and is "resting comfortably," her publicist said Monday, nearly two weeks after Carey suffered an "emotional and physical breakdown."

Carey publicist Cindi Berger said the Glitter postponement was entirely Fox's decision. A studio rep wasn't immediately available for comment, but with the 31-year-old singer already canceling her publicity tour to hype Glitter, Fox presumably didn't want to release the film without her.

Meanwhile, there's no word on whether the film's soundtrack--Carey's first release for Virgin Records--will still hit stores as scheduled August 21. Berger said Monday she was awaiting word from Virgin on whether that, too, will be postponed.

Carey has been under psychiatric care at an undisclosed hospital since July 25, just days after she made a series of bizarre public appearances and posted several rambling messages to fans on her official Website. "What I'd like to do is take a little break, or at least get one night of sleep," read one of the postings.

Her publicist cited a breakneck work schedule for the hospitalization. Aside from Glitter and its accompanying soundtrack, Carey also had been shooting another film, Wisegirls, costarring Mira Sorvino, due out next February.

Glitter was produced by Carey and marks her first-ever lead role. She plays, appropriately enough, an aspiring singer who embarks on a meteoric rise to fame. The soundtrack also marks Carey's first disc for Virgin, which signed her to a multi-album, multimillion-dollar deal after she left Sony Music in April.