Hollywood star Calista Flockhart shared the key to her and her husband’s enduring marriage. She and iconic actor Harrison Ford have been married since 2010. Recently, famous actress Calista Flockhart sat down for an interview with a media outlet. She discussed her career, including her new series “Feud: Capote vs. The Swans,” and aspects of her life, like her marriage with film legend Harrison Ford. During the conversation, the “Supergirl” star revealed what makes their relationship last and what has helped it endure for so many years. Ford and Flockhart have been admired as a Hollywood ‘It’ c…