Jon and Kate Gosselin file for divorce

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updated 5:23 p.m. ET June 22, 2009

After months of speculation, the 10-year marriage of “Jon & Kate Plus 8” stars Kate and Jon Gosselin appears to be coming to an end.

Documents to initiate a legal split were filed at the Berks County Courthouse in Reading, Pa., Monday afternoon.

Fans who have watched the couple's popular TLC show — or read the voluminous coverage of the Gosselin marriage in the press — will hardly be surprised: The duo had long maintained a tense relationship, with Jon recently telling PEOPLE he wanted a less high-profile life, while Kate appeared to remain committed to their TV career.

In February, photos surfaced of Jon in the company of young women during a solo visit to see his mother, who was recuperating from surgery, in Huntingdon, Pa. The couple quickly attempted to quash rumors of problems. But in May, the scandal erupted again when 23-year-old Deanna Hummel was photographed driving Jon's car home from a bar late at night.

When the fifth season of the Gosselins' show premiered May 25, the couple admitted to having problems and not knowing where their relationship was headed. "Parents of multiples have triple the divorce rate," Kate said through tears. "I was thinking we were going to beat that. I don't know if I can say that anymore."

TLC promotions of the show are promising a major announcement about the family in Monday night's episode of “Jon & Kate Plus 8.”