Six weeks after Arnold Schwarzenegger revealed he had fathered a child out of wedlock, wife Maria Shriver filed divorce papers Friday to end their marriage of 25 years. The former television journalist and Kennedy family heiress cited irreconcilable differences but offered no additional details about the breakup. She also did not list a date when the couple separated, although they announced they had done so on May 9. A week later, the former California governor and one-time action star admitted he fathered a child with a member of his household staff years ago. Article continues below The filing, which Shriver signed nearly two weeks ago, signals an end to a union that began with a storybook wedding in 1986 in Cape Cod and brought together a bodybuilder and rising action star and a princess of the Kennedy clan, herself an up-and-coming network newscaster. They apparently entered marriage with no plans that it would end. Shriver\'s filing does not indicate the couple had a premarital agreement. That means Schwarzenegger\'s earnings from a career as a Hollywood megastar, which allowed him to forgo a salary as governor and commute by private jet to Sacramento, likely will be evenly divided with his estranged wife.