Seyfried's profile gained prominence due to her role in the highly acclaimed HBO drama television series Big Love. The series centers on a fictional fundamentalist Mormon family, in which Seyfried plays Sarah Henrickson, Bill and Barb's first daughter, who struggles with her family's polygamous faith.[15] Big Love premiered in the United States on March 12, 2006. In December 2009, HBO confirmed that Seyfried would return for the show's fourth season, but that it would be her last, as Seyfried wished to concentrate on her film career and upcoming projects.[16]