Kristen Stewart is having a rough summer ... her mom has now filed for divorce.

In fact, Kristen Stewart isn't the only member of her family experiencing relationship crises.

Jules Stewart filed the divorce petition on August 17 in L.A. County Superior Court.? Jules, who married John Stewart 27 years ago, cites irreconcilable differences.

Jules filed the divorce docs herself, without using a lawyer.

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As for the date of separation, Jules says she and her hubby have been estranged since June 15, 2010.

Both parents work in film production. Jules is a writer/director. John is a Fox TV producer and stage manager.

News of the couple's split comes a little more than a month after it was revealed that Kristen, 22, cheated on longtime boyfriend Robert Pattinson with her Snow White and the Huntsman director, Rupert Sanders.

So far ... no comment from Kristen.

滬江娛樂(lè)快訊：繼電影《暮光之城》的男女主角感情危機(jī)曝光之后，女主角斯圖爾特的母親Jules和父親John的婚姻危機(jī)也被曝光。斯圖爾特的父親John是美國(guó)Fox電視臺(tái)的節(jié)目制作人和舞臺(tái)監(jiān)督，母親Jules是一名劇本監(jiān)督員及編劇，兩人在二十七年前結(jié)婚，但在2010年時(shí)彼此的關(guān)系就已破裂。近日，她的母親Jules向洛杉磯縣高等法院提交了離婚申請(qǐng)。