Jon and Kate Gosselin, stars of the hit reality show Jon & Kate Plus 8, filed for divorce in Bucks County this afternoon, according to the Web site People.com.

The report came just hours before the couple were to make a much-ballyhooed announcement on tonight's special one-hour edition of their show.

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The Gosselins have been married for 10 years, but their show's fifth season opened late last month against a backdrop of domestic discord and tabloid rumors of infidelity.

TLC has been running promos with Kate saying, "Recently, we've made some life-changing decisions - decisions that will affect every member of our family."