Energy magnate T. Boone and his fourth wife, Madeleine, are filing for divorce, the Associated Press reports.
A spokesperson told the AP that their parting is amicable.
She's also a big philanthropist focusing much of her charity work on animal welfare, especially saving America's wild mustangs.
She was born in Iraq to a British father and a Lebanese mother . Eventually she immigrated to the U.S. where she became a U.S. citizen, according to a profile in Nevada Magazine.
They were married in 2005.
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