Madonna is seeking legal advice to end her marriage of seven years to film director Guy Ritchie, according to the Times of London.
The 49-year-old pop star reportedly has begun seeking advice from divorce attorney Fiona Shackleton, who represented Paul McCartney in his divorce from model Heather Mills.
Ritchie, 39, is believed to be consulting with Forsters, a lesser-known London law firm, the Times reported.
A spokesman for Madonna declined to comment to the Times.
Shackleton — dubbed the "steel magnolia" for her pragmatic style — also represented Prince Charles in his divorce with the late Princess Diana.
Madonna and Ritchie apparently did not have a prenuptial agreement, according to the Times, which could potentially lead to a 50-50 split of assets.
Madonna, who reportedly met Shackleton for a preliminary meeting in April, is believed to be worth about $600 million.