Celebrity Amanda Seyfried Engaged to 'Last Word' Costar Thomas Sadoski The couple began dating in March By Karen Mizoguchi Published on September 12, 2016 10:00PM EDT Photo: Pascal Le Segretain/Getty Images Amanda Seyfried is a bride-to-be! The actress is engaged to her Last Word costar Thomas Sadoski, a rep for Seyfried confirms to PEOPLE. Earlier this month, Seyfried, 30, was pictured wearing a silver band on her left ring finger while out and about with her beloved dog Finn in New York City. She and Sadoski, 40, first met while working together on the off-Broadway show The Way We Get By last year, and began their romance when they reunited on the set of their upcoming film The Last Word. PEOPLE confirmed their relationship in March. This will be Seyfried’s first marriage and the actor’s second. Sadoski was previously married to Kimberly Hope, from whom he divorced in October 2015 after eight years. The SAG-nominated star previously dated Justin Long and Dominic Cooper.