Norah Jones has admitted that she felt "terrified" after finding out that she would be appearing alongside Hollywood stars in her new movie.

The American singer appears in My Blueberry Nights with Jude Law, Natalie Portman, Rachel Weisz and David Strathairn, and the 27-year-old's nerves were obvious on the first day of filming.

"When I heard the list of actors I felt absolutely terrified," she revealed. "I thought to myself, 'What have you got yourself into?' When I listened to the playback after my first scene with Jude my voice sounded like I had been sucking a helium balloon. You could all but hear my knees knock."