The couple made their first appearance together in 2012. This marks the third marriage for Hall, who split from his Dexter costar Jennifer Carpenter in 2012 and was married to actress Amy Spanger from 2002 to 2007.
Macgregor is a Los Angeles-based book critic. Hall just finished starring in the New York theater production of Lazarus.His next film, Christine, premiered at Sundance Film Festival in January.
Watch: Michael C. Hall married girlfriend Morgan Macgregor