Diane Neal (born November 17, 1976) is an American actress best known for her role as Casey Novak on Law & Order: Special Victims Unit, which she played from 2003 to 2008, then reprised her role from 2011 to 2012. She has portrayed Special Agent Abigail Borin in the NCIS franchise since 2009, appearing as an annual special guest star in NCIS since its seventh season, and as a recurring guest star in NCIS: New Orleans.