Confirmation of Prince William and Kate Middleton's Breakup
The couple had been under intense media pressure since they met at St Andrews University, Fife, in 2001, BBC royal correspondent Peter Hunt said.
The prince's move to an army camp in Dorset, and Miss Middleton continuing her life in London, are also said to have put a strain on the relationship.
A spokesman at the prince's office at Clarence House says they will not be commenting. "We don't comment on Prince William's private life," the rep says. Britain's The Sun newspaper first reported Saturday that the pair had reached an "amicable agreement" to separate.