Former 'Housewives of Beverly Hills' castmember Marisa Zanuck and her husband Dean are calling it quits after 13 years of marriage.
Marisa filed the divorce docs in L.A. last month, but the writing's been on the wall for at least 3 years or so. Back in season 3 of 'RHOBH' she called Dean "not her type" ... but tried to blow it off, claiming Dean loved her loose lips. Guess not.
Marisa wants she and Dean to have joint legal and physical custody of their two boys, ages 11 and 13.
Dean comes from Hollywood royalty ... his late father was Richard D. Zanuck, the big time producer of "Jaws," "Cocoon," "Driving Miss Daisy" and more.