Luke Arnold was born in 1984[1] in Adelaide, South Australia, and went to primary school there until his family moved to Sydney.

[4] Arnold appeared on stage in Tim Conigrave's Like Stars in My Hands, directed by Robert Chuter at La Mama Courthouse, Melbourne in 2008.

[citation needed] In 2020, he took on a temporary role of Lewis Hayes in the TV soap opera Home and Away, playing a nurse with a grudge against a doctor.

[10][11] On 4 September 2024, Arnold was named as part of the extended cast for SBS drama Four Years Later.

[14] Arnold published a trilogy named The Fetch Phillips Archives, an urban fantasy story.