Luddington was born in Ascot, Berkshire, England, United Kingdom on 15 December 1983. She was educated at the Marist Senior School, an all-girls school in Ascot, Berkshire.[citation needed] She later attended The American School In England at Thorpe in Surrey. She moved to suburban Austin, Texas for a year when she was 14 and attended Westwood High School.[citation needed] She graduated from TASIS, The American School in England in 2002.[5]

When she was nineteen she enrolled in Susquehanna University[6] in Pennsylvania. However, Luddington had not been to the university before she came to study, and after six months she left and transferred to the New York Film Academy.[7] She was part of the school＇s first one year acting class program in 2003.[8] After her acting studies, Luddington then returned to England before moving to Los Angeles to pursue a career in acting.