Jenna Dewan filed for divorce from actor Channing Tatum in Los Angeles onFriday.
The former "World of Dance" host cited irreconcilable differences as the reason for the split, TMZ reported.
She also requested spousal support and joint legal and physical custody of their 5-year-old daughter, Everly.
Tatum agreed to joint custody of Everly, but is trying to block the court's ability to award Dewan spousal support.
Dewan and Tatum announced their separation in April after nearly nine years of marriage.
Earlier this month, media reports said Tatum is dating singer Jessie J.
Dewan announced she would not return to host the third season of "World of Dance" earlier this month.
"I have some news to share: I will not be returning to the show as host for season 3. But! I won't be able to stay away for long, and plan to return to mentor contestants as much as possible," she wrote in an Instagram posting.
"It has been an absolute thrill to be a part of this incredible, groundbreaking show from the very beginning, and I am forever grateful to my @nbcfamily, @jlo, @derekhough @neyo and everyone involved in this journey," she added, referencing "World of Dance" judges Jennifer Lopez, Derek Hough and Neyo.
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Dewan didn't offer an explanation for her departure.