Guy Ritchie and Madonna by Jeff Vespa/ WireImage.com
The on-again, off-again Madonna divorce rumor mill appears to be on again.

The Times of London reports Madge "is understood to be seeking legal advice" from U.K.-based celeb divorce lawyer Fiona Shackleton to handle the termination of her seven-year marriage to film director Guy Ritchie.

Madonna's reps have denied divorce rumors since they first surfaced several months ago, and told London's Daily Paper that the divorce talk is "completely untrue" when rumors stirred up once again earlier this month. They did not comment on the Times report.

The Times estimates Madonna, 49, has assets totaling roughly $600 million. She and Ritchie, 39, have a son, 7-year-old Rocco, and Madonna has a daughter, 11-year-old Lourdes. They are also supporting a Malawian boy they plan to adopt.

Shackleton, by the way, is, in divorce lawyer circles, a queen of cha-ching. She orchestrated Paul McCartney's retention of nearly all of his $1.6 billion fortune in his recent divorce from Heather Mills. - J.R. Whalen

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