Oscar-winning actress Renee Zellweger and country singer Kenny Chesney are seeking an annulment after four months of marriage.
The couple wed on a beach in the Virgin Islands in May
The Bridget Jones star, 36, married Chesney, 37, on a Caribbean beach in May, having met four months earlier at a benefit for tsunami victims.
In court papers Zellweger listed "fraud" as the reason for the break-up but did not elaborate.
Chesney is one of the biggest country music stars in the US.
He was named entertainer of the year at the US Academy of Country Music awards in May, with hits including Me and You and She Thinks My Tractor's Sexy.
Zellweger won a best supporting actress Oscar for Cold Mountain in 2004, and was also nominated for her roles in Chicago and Bridget Jones's Diary.
It was the first marriage for both Zellweger and Chesney.
In US law, an annulment is a decree that a marriage was invalid from its outset.
Anyone seeking an annulment on the grounds of "fraud" must prove that their partner misrepresented some matter that was vital to the marriage.
This may include the concealment of a fact such as an existing spouse, permanent impotence or a criminal history.
If either party was under the influence of drugs or alcohol when the marriage took place, it may also be grounds for its annulment.
However, Zellweger's lawyer and her spokeswoman Nanci Ryder declined to give any details regarding the "fraud" claim in this case.
In her court submission, Zellweger also demanded that the court rule out the possibility of spousal financial support for Chesney.
The pair first met at the Concert of Hope tsunami relief benefit in January, where Chesney was singing and Zellweger was answering telephones.