Fox was born in Oak Ridge, Tennessee[2] to Darlene Tonachio, former Roane County, Tennessee Tourism Director,[2][3] and Franklin Foxx.[4] Fox's father dropped an "x" from his surname prior or subsequent to Megan's birth. Fox has one older sister.[5] She is of Irish, French and Native American ancestry.[6] Fox grew up in nearby Rockwood, Tennessee, beginning her training in drama and dance at age 5, in Kingston.[4] She attended a dance class at the community center there and was involved in Kingston Elementary School's chorus and the Kingston Clippers swim team. At 10-years-old, after moving to St. Petersburg, Florida, Fox continued her training. She attended Morningside Academy, a private Christian school, in Port St. Lucie, during her middle school years and finished her high school education at St. Lucie West Centennial High School, in Port St. Lucie.[2][7][8]