Sharon and Ozzy Osbourne are reportedly living apart
The couple - who have been married for 31 years - have moved out of their home and are in separate homes two miles away from each other in Beverly Hills.
A friend told The Sun on Sunday newspaper: "They are living at different addresses and not spending any time together. They row a lot.
"They aren`t acting like husband and wife. It is unusual to not even have dinner together when both of them are five minutes apart."
Both have been spotted without their wedding rings recently, and their relationship could continue to be strained with Ozzy, 64, set to tour with Black Sabbath and a rumoured `X Factor` UK return for Sharon.
The couple have apparently been having fierce arguments lately, and the insider revealed they haven`t met up despite having chances to been together.
The source added: "Sharon and Ozzy have had plenty of opportunities to meet up but haven`t spent any time together at all.
"Sharon films `The Talk` four days a week and Ozzy has been rehearsing but they`ve both had days off and still not seen one another.
"It`s pretty unusual for a married couple to spend such a long time apart, especially when they both have drivers and can be at each other`s houses in five minutes."
However, a spokesman for Sharon, 60, dismissed the idea their marriage was "on the rocks" and said her new hotel home is "for work".
He said: "They`ve both got huge work commitments. She is at the hotel for work and he is starting his Black Sabbath tour.
"Of course they row but they are still together. Sharon and Ozzy have spent long periods of time apart before when she was working in the UK. The marriage is not on the rocks."