But, a big size wrench can be thrown into that rumour mill by another rumour that Stana and Nathan were having issues getting along on the set of the series. Her major breakthrough came when she landed her role in the series Castle but that aside, she has also featured in other works as well. The year-old actress at the Independent Spirit Awards in February She was often rumoured to be dating her Castle co-star Nathan Fillion, who her character married on the show. Is Stana Katic Married? Stana and Nathan in their wedding scene from Castle: The walk down the aisle took place on the same weekend as the Castle star's 37th birthday.