Keeley was born in 1990 and raised in Tullamore in County Offaly in Ireland. In his earlier years he had an interest in establishing a music career. Whilst attending Coláiste Choilm Secondary School,[5] his interest in acting developed and he expanded his acting skills following his failure to complete his Leaving Certificate exams.[7]
In his early 20s, he shared his time living between Tullamore and Dublin. During the making of The Cured, he became a vegetarian.[8] In 2016, he left Dublin to reside partly in Iceland.[5]
