Shannon Marie Kahololani "Shannyn" Sossamon (born October 3, 1978) is an American actress. She has appeared in the films A Knight's Tale (2001), 40 Days and 40 Nights (2002), The Rules of Attraction (2002), The Order (2003), Kiss Kiss Bang Bang (2005), The Holiday (2006), Wristcutters: A Love Story (2006), Road to Nowhere (2009), The End of Love (2012), and Sinister 2 (2015).
As a musician, she provided vocals and drums to Warpaint from 2004 to 2008. She abruptly left the group after recording their first EP. Sossamon's sole recording with the band is the 2009 EP Exquisite Corpse.
In 2009, Sossamon began directing and producing shorts and music videos through her small production company, the Maudegone Theater.