Krysten Alyce Ritter (born December 16, 1981) is an American actress. After an early modelling stint, she appeared on the UPN noir mystery series Veronica Mars (2005-2006) and the CW comedy-drama series Gilmore Girls (2006-2007). Her breakthrough role was Jane Margolis on the AMC drama series Breaking Bad (2009-2010), a character she reprised in its spinoff film El Camino (2019). She headlined the ABC sitcom Don't Trust the B---- in Apartment 23 (2012-2013) before playing the character Jessica Jones on the superhero series Jessica Jones (2015-2019) and The Defenders (2017), both set in the Marvel Cinematic Universe. She also appeared in the Max miniseries Love & Death (2023).

Ritter's early film roles include the romantic comedies 27 Dresses (2007), What Happens in Vegas (2008), Confessions of a Shopaholic (2009), and She's Out of My League (2010). She wrote, co-produced, and starred in the comedy Life Happens (2011). This was followed by roles in the horror comedy Vamps (2012), the comedy-drama Listen Up Philip (2014), the Veronica Mars continuation (2014), the biographical drama Big Eyes (2014), the comedy-drama The Hero (2017), and the dark fantasy Nightbooks (2021).

Outside of acting, Ritter serves as a singer and guitarist for the indie rock duo Ex Vivian, and released the psychological thriller novel Bonfire in 2017.

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