Patricia Arquette Maggie Murdaugh Actor Jason Clarke Alex Murdaugh Actor Patch Darragh John Marvin Murdaugh Actor Andrea Powell Renee Beach Actor Johnny Berchtold Paul Murdaugh Actor Will Harrison Buster Murdaugh Actor Brittany Snow Mandy Matney Actor J. Smith-Cameron Marian Proctor Actor Gerald McRaney Randolph Murdaugh Actor Noah Emmerich Randy Murdaugh Actor Steven Piet Director Erin Lee Carr Writer Michael D. Fuller Writer David Moses Executive Producer Bill Johnson Executive Producer