Rosie Day is an English actress. She started her professional acting career in the late 1990s, debuting on Hope and Glory. She next made one-time appearances on the shows Black Books, In Deep, Family Affairs, and Big Train. Her first notable role was as Nicolette Ashbury on the ITV show Bernard’s Watch. She next had guest roles on My Life as a Popat, The Large Family, and Doctors. In 2012, she made her film debut in The Seasoning House. She next had performances in the movies Heart of Lightness and Sixteen. In 2016, she played Mary Hawkins on Outlander. She recently had a role in the movie Down a Dark Hall.