Amanda Seyfried According to E! News and actress' rep, 'Mean Girls' star Amanda Seyfried and her fiancé, actor Thomas Sadoski, are expecting their first child! Seyfried and Sadoski, who became engaged back in September this year, first met while working together on the Broadway show 'The Way We Get By' in 2015. That same year, Seyfried spoke to Marie Claire UK about having a child, saying, "I want to be a mother, badly. That’s what I feel. I’ve been feeling it for like, two years.