Anna Katherine Popplewell (born 16 December 1988) is an English actress. Popplewell is known for playing Susan Pevensie in the fantasy film series The Chronicles of Narnia (2005–2008), that earned her a number of accolades.

Aside from her The Chronicles of Narnia role, Popplewell played the role of Chyler Silva in the web series Halo 4: Forward Unto Dawn (2012) which is based on the video game of the same name, and starred as Lady Lola in the historical romantic drama series Reign (2013–2016), which was her first leading role in a television series.