Sandra Bullock Pulls Out of London Premiere of 'The Blind Side'

Don’t expect to see Sandra Bullock smiling for a walk down the red carpet in London.

The star, 45, has pulled out of the premiere next Thursday for her movie, The Blind Side, due to “unforeseen circumstances.”

Bullock won an Oscar earlier this year for her role as Leigh Anne Tuohy in the Academy Award nominated film.

According to Us Weekly, a Warner Brothers rep confirmed Bullock would not be attending the premiere, which has since been cancelled.

The cancellation happened as a new tabloid report claimed her husband, Jesse James, 40, cheated on her with a model.

Neither Bullock or James have yet commented on the allegations, but James had cancelled his Twitter account, despite formerly tweeting on a daily basis.

James got teary-eyed at the Oscars earlier this month after his wife won her Best Actress statue.

“I’m so proud of her. She deserves it more than anybody,” he said after the show.

When Bullock accepted her SAG award in January, she praised James, her husband of nearly five years, for enduring the awards-show circuit this year.

“You get dressed up in monkey suits and you sit at a table with people you don’t know. I love you so much, and you’re really hot,” she said then.