True Blood star joins Mothers Day August 7, 2009 True Blood’s Jessica goes psychotic! True Blood star Deborah Ann Woll has joined the cast of upcoming horror pic Mother’s Day. The film follows three female friends who encounter two brothers trying to impress their unhinged mother by going on a murderous rampage. Based on the cult 80 pics, Darren Lynn Bousman will direct the new version, which expands the psychotic family to include a daughter (Woll). The story finds them returning to their old home to terrorise new residents.