Kelsey Grammer and Camille Grammer

Kelsey Grammer and wife Camille Donatacci are divorcing after 13 years of marriage.

Grammer tweeted Thursday: "Yes it's TRUE."

Donatacci, a former Club MTV dancer and Playboy model, filed papers in a Los Angeles court Thursday, citing "irreconcilable differences," TMZ reports. She is seeking spousal support and requested joint legal and primary physical custody of their children, daughter Mason, 8, and son Jude, 5, according to the site.

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The Grammers have been married since 1997 and recently attended the Tonys together. Grammer, 55, was nominated for his role in Broadway's La Cage Aux Folles, in which he's still appearing. Donatacci, 41, is part of the cast of Bravo's upcoming Real Housewives of Beverly Hills.

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This will be the third divorce for the veteran actor. He has a daughter, actress Spencer Grammer, 26, with his first wife, dance instructor Doreen Alderman. In 1992, he married former exotic dancer Leigh-Anne Cushany. While married to Cushany, he had a daughter, Greer, 18, with hairdresser Barrie Bucker.

Calls and emails to Grammer's rep and Donatacci's lawyer were not immediately returned.