Harley hails from Gidgegannup, Western Australia. He is currently on contract at Universal Studios Japan as a featured vocalist. Before moving internationally, Harley received a Bachelor of Music Theatre from the Elder Conservatorium of Music, and a Diploma of Musical Theatre from the Western Australian Academy of Performing Arts.

While at university, he played the roles of Emmett in Legally Blonde (dir. Nikki Snelson), Thérnadier and Ensemble Swing in Les Misérables (dir. Erin James), Cladwell and Lockstock u/s in Urinetown (dir. George Torbay), and performed as a featured vocalist in In Pieces. Harley also has a deep interest in music, having played guitar, saxophone, and percussion throughout his life.