Sandra Bullock has pulled out of her UK premiere and press tour for The Blind Side, the film which won her an Oscar.
In a statement the star said: "Due to unforeseen personal reasons a trip abroad to support 'The Blind Side' has been deemed impossible at this time."
She added: "I apologise for any inconvenience this may have caused and thank you for your continued support of the film."
It comes after a US magazine published a story claiming her husband Jesse James cheated on her. In Touch featured an interview with the alleged mistress.
Sandra was recently accompanied to the Academy Awards by her husband. She gushed about him following her win and spoke about her happiness at home at several other award ceremonies this year.
The 45-year-old married the motorcyle enthusiast and reality star in 2005.