Julia Roberts refuses to join the ranks of stars making cameo appearances on musical TV series Glee - despite branding herself a "great singer".
The hit U.S. comedy, about a high school show choir, boasts a huge list of celebrity fans, and A-list stars including Jennifer Lopez and Britney Spears have been confirmed for roles in future episodes.
Glee creator Ryan Murphy recently directed Roberts in her new movie Eat Pray Love - but she is adamant he'll never persuade her to sing on the show.
She tells Reuters, "(Actor) Billy Crudup and I were in a Woody Allen musical a couple of years ago and so he said, 'Oh, you're a great singer,' and my husband said, 'You are a great singer.'
"So, now I'm going to say I am a great singer, (but) I'm not just going on Glee."
Roberts is back in a new movie Ear Pray Love which is an adaptation of the Elizabeth Gilbert novel and sees the Oscar winning actress star alongside Javier Bardem and James Franco.
Roberts has completed work on Larry Crowne, in which she reunites with Tom Hanks, and has been linked to several projects including Birds In Fall and A Flowering Evil.
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