Krysten Alyce Ritter (born December 16, 1981) is an American actress and model. She came to prominence when she appeared as Jane Margolis in the AMC drama series Breaking Bad (2009–2010) and its spinoff film El Camino (2019). She then had lead roles in the ABC sitcom Don't Trust the B---- in Apartment 23 (2012–2013) and the Netflix superhero series Jessica Jones as the eponymous character (2015–2019), reprising the latter in the follow-up miniseries The Defenders (2017).

Ritter has also appeared in the television series Veronica Mars, Gilmore Girls, 'Til Death, and Gravity. She appeared in the films What Happens in Vegas (2008), Confessions of a Shopaholic (2009), She's Out of My League (2010), Veronica Mars (2014), Big Eyes (2014), The Hero (2017), and Nightbooks (2021).