Jennifer Carpenter (born December 7, 1979) is an American actress. She garnered wide attention for her role as the titular character in the supernatural horror film The Exorcism of Emily Rose (2005), which established her as a scream queen. She rose to prominence for playing Debra Morgan in the crime drama series Dexter (2006–2013), which she reprised in the miniseries Dexter: New Blood (2021–2022). Her accolades include a MTV Movie Award and a Saturn Award, in addition to nominations for a Critics' Choice Television Award and four Screen Actors Guild Awards.

Carpenter's television roles beyond Dexter include Rebecca Harris in the comedy drama series Limitless (2015–2016) and Erica Shephard in the drama series The Enemy Within (2019). Her film roles include Angela Vidal in the found footage horror film Quarantine (2008) and Sonya Blade in the direct-to-video Mortal Kombat films Scorpion's Revenge (2020) and Battle of the Realms (2021).

Carpenter was born in Louisville, Kentucky, the daughter of Catherine (née Mitchell) and Robert Carpenter. She attended St. Raphael the Archangel and then Sacred Heart Academy. She trained at the Walden Theatre Conservatory program, and later at New York City's Juilliard School (Drama Division Group 31: 1998–2002).

Before graduation, she was cast in the 2002 Broadway revival of Arthur Miller's The Crucible starring Liam Neeson and Laura Linney.