Say it ain't so!

A new report claims that Marisa Zanuck — who frequently appeared on Real Housewives of Beverly Hills — and her husband, Dean Zanuck, are divorcing after 13 years of marriage.

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Marisa and Dean Zanuck.

TMZ states Marisa originally filed last month and requested joint legal and physical custody of their children — 13-year-old son, Jack, and 11-year-old daughter, Darryl.

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Marisa, who was best known for being tight with Kyle Richards on the Bravo reality series, left RHOBH in 2013 after one season.

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Marisa Zanuck and Kyle Richards.

"I wasn't asked back. It's as simple as that and I'm okay with it. Housewives was a once-in-a-lifetime experience and I am grateful that Bravo gave me the opportunity to step into their crazy world," she told Celebuzz at the time.

She revealed during her time with the franchise that her film producer estranged hubby "wasn't her type."