Internet tabloid reports surfaced Wednesday alleging that 40-year-old motorcycle builder had been unfaithful to Bullock, whom he married in 2005. Bullock subsequently canceled a planned appearance in London for the premiere of "The Blind Side," for which she won an Oscar, a Screen Actors Guild Award and a Golden Globe.
The 45-year-old actress said in a statement by Warner Bros. UK that she cannot attend next Tuesday's premiere for "unforeseen personal reasons." She canceled her appearance two weeks after winning an Oscar for her performance in the movie.
Bullock goes on to apologize for canceling her commitment and to thank people for their support of the film, which has made nearly $253 million domestically.
Representatives for James and Bullock did not respond to calls and e-mails seeking comment.