Kate and Jamie are said to be living separate lives after having a “blazing row” in their home a few weeks ago.
A source told The Sun that the couple, who have been married since 2011, have been battling “arguments and jealousy” and “they both seem interested in different things”.
Rumours of a rift between the couple first emerged when Jamie, 46, was spotted at Glastonbury Festival by himself earlier this year. In previous years, he had attended the festival with Kate by his side.
Jamie’s friendship with socialite Lady Mary Charteris and her husband Robbie Furze is said to be another area of conflict for the couple, with Kate reportedly taking a dislike to Lady Mary.
Kate and Jamie haven’t been pictured at an event together since April, and The Mirror reports that Jamie is due to go on tour in the US with his band The Kills later this week.