Crystal Marie Reed (born February 6, 1985) is an American actress. She came to prominence playing Allison Argent in the series Teen Wolf (2011–2014). She departed the series after the third season but made a guest appearance in the fifth season as Allison's ancestor Marie-Jeanne Valet. Reed went on to reprise her role as Allison Argent in the reunion film Teen Wolf: The Movie (2023).
Reed played Sofia Falcone in 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).