Graham Caldwell was born in Edinburgh, Scotland, but moved to Louisville, Kentucky, when he was two months old. His mother is American musician Brigid Kaelin. Multiple local talent agencies recruited Graham as a baby, but he did not pursue acting until he was five years old, after filming a regional commercial. At age six, he filmed Dark Waters with Mark Ruffalo and Anne Hathaway. Soon after, he played Young Macduff in Walden Theatre's production of Macbeth. He is a voracious reader and does book reviews as @GrahamReads on Instagram and Twitter.