Tara Reid's sudden wedding in Greece to Zack Kehayov caught many by surprise, but is the union legally recognized in the United States?

The American Pie star’s marriage must be registered in Greece with the Vital Statistics Office of the city where the ceremony was performed within 40 days or it won't be recognized in the U.S., RadarOnline.com is exclusively reporting.

According to the United States Embassy website, "Marriages of American citizens in Greece are not registered at the Embassy, but instead at the Vital Statistics Office (Lixiarhio) of the city where performed.