10 november, 2000
Mackenzie began her career as a child model at age 4, appearing in ads for big brands such as Polo Ralph Lauren, Gap and The Walt Disney Company.
Her first acting role came in 2009 in the TV series "'Til Death" (2006). One-off appearances followed in various TV shows. 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).