Hi @mikemearls & @JeremyECrawford Will great weapon fighting allow me to rerole both damage dice whilst using a great sword?

— Lux 🕹 (@LuxTheLad) February 27, 2018

Yes

— Mike Mearls (@mikemearls) February 28, 2018

Great Weapon Fighting applies to any of the dice of a qualifying weapon. #DnD https://t.co/HpP9jtEkWW

— Jeremy Crawford (@JeremyECrawford) February 27, 2018