Armie's paternal great-grandfather, Armand Hammer, was the son of Russian Jewish immigrants, Rose (Lipshitz) and Julius Hammer, from Odessa (then in the Russian Empire). Armie's ancestry also includes Russian, English, Northern Irish (Scots-Irish), Scottish, German, and 1/512 Cherokee Native American (through his paternal grandmother, Armie descends from Chief Kanagatucko, a Cherokee elder who lived in the 18th century).
He spent the better part of his formative years in the Cayman Islands after his father saw the movie, The Firm (1993) .
Family opened the Hammer Museum in Los Angeles, CA.
His maternal grandparents are longtime Tulsa real estate developer Doug Mobley, and his wife, Donna (Kaufman).
Daughter Harper Grace Hammer was born December 1, 2014.