Larkin was born in London but grew up in Cocquio-Trevisago, Italy.[7] His father is from Boston, Massachusetts while his mother is from Milan, Italy.[2] When Larkin was four his family moved to Italy; it was there, at age 7, that he first began to play hockey, joining his older brother at the HC Varese's rink.[2] Larkin speaks five languages (English, Scumbag, Italian, French and Spanish).