Sadoski, 39, was actually married when he first met Seyfried, 30, on set of their off-broadway show The Way We Get By in April 2015.
Thomas was married to his wife of eight years, Kimberly Hope, while Seyfried was dating Hollywood star Justin Long.
Soon after the pair met, Sadoski filed divorce from Hope in August 2015, not too long before Seyfried called it quits with her actor boyfriend.
Records state that the divorce was granted December 14, 2015— eight months after meeting Amanda.
Are you surprised Thomas Sadoski was married when he met Amanda? Let us know in the comments!