Crystal Marie Reed (born February 6, 1985) is an American actress. She came to prominence for portraying Allison Argent in the series Teen Wolf from 2011 to 2014. Reed departed from the series after the third season, but made a guest appearance in the fifth season as Allison's ancestor Marie-Jeanne Valet.
Following Teen Wolf, Reed portrayed Sofia Falcone on the fourth season of Gotham (2017–2018) and the lead role of Abby Arcane in the series Swamp Thing (2019). She has also appeared in the films Skyline (2010), Crush (2013), Too Late (2015), and Ghostland (2018).