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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