Kristen Stewart is reported to be losing sleep because she is so nervous about making her first public appearance since she was revealed to have cheated on Robert Pattinson.
The Twilight star is due to step out in front of the crowds and the media for the premiere of On The Road at the Toronto Film Festival tomorrow - and Radar Online claims that the 22-year-old is a bag of nerves.
"Kristen Stewart hasn't been able to get a wink of sleep in the run-up to the film festival," a source was quoted as saying.
"Even though members of the media have been strictly told that questions about her cheating scandal are off-limits, she's been fretting over the film's premiere."
The gossip site also claims that K-Stew is concerned On The Road won't be given a fair reception because of the scandal around her fling with Snow White And The Huntsman director Rupert Sanders.
"She really hopes that the critics are kind to her when it comes to the reviews and they don't judge her on her personal life," the source added.
"On the Road is a project that's very close to Kristen's heart... [she] wants the movie to get the praise she thinks it deserves."