Jodi Lyn O'Keefe (born October 10, 1978) is an American actress, model and fashion designer. She came to prominence for her portrayal of Cassidy on the television series Nash Bridges (1996–2001). She is also known for playing Gretchen Morgan on Prison Break (2007–09), and for her roles as Jo Laughlin on The Vampire Diaries (2014–17) and Lionel Davenport on Hit the Floor (2014–18). Her film credits include Halloween H20 (1998) and She's All That (1999).
