Mackenzie Christine Foy was born 10 November 2000. She began her career as a child model in 2004, working for Garnet Hill, Polo Ralph Lauren, and Guess Kids. She has also modeled in print ads for companies such as Rubbermaid, Jones Apparel Group, The Walt Disney Company, Mattel, Target Corporation, Talbots, Guess, and Gap.
Foy got her start appearing in commercials. Her first acting role came in 2009 in the TV series 'Til Death (2006). She has guest starred on Hawaii Five-0 (2010) and R.L. Stine's The Haunting Hour (2010). At age 11, she landed her breakthrough role as Renesmee, the daughter of Bella and Edward in The Twilight Saga: Breaking Dawn - Part 1 (2011) and The Twilight Saga: Breaking Dawn - Part 2 (2012). She filmed The Conjuring (2013) and lent her voice to The Boxcar Children (2014), along with her Conjuring co-star Joey King.