Anderson's representative said the former "Baywatch" star filed for divorce last week, but would not comment on the reason or any particulars of the divorce.
A publicist for Kid Rock, whose real name is Bob Ritchie, didn't immediately return messages left by The Associated Press on Monday.
The relationship between Anderson, 39, and Ritchie, 35, has been a turbulent one since they became engaged in 2002. They broke up the following year, but later reunited and this summer embarked on a tour of wedding ceremonies.
They were wed in late July near St. Tropez, France, and again at a courthouse in Beverly Hills, California, on August 3. They tied the knot a third time in an August 17 ceremony in Nashville, Tennessee.
Earlier this month, Anderson's spokesman, Tracy Nguyen, confirmed that Anderson recently suffered a miscarriage. The pregnancy was not believe to be far along.
Anderson has two sons, Brandon, 10, and Dylan, 8, from her marriage to rocker Tommy Lee. Ritchie, a Michigan native who owns a condo in Nashville, has a 13-year-old son, Bob Jr.
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