The 24-year-old frontman has recently signed to Sony Music and has given fans a taste of what's to come with his debut solo single, "Starting Line", produced by Sammy Witte.
The ballad comes after the "Youngblood" singer recently popped the question to his longtime girlfriend, Sierra Deaton, last month (Jun21).
Luke's album, "When Facing the Things We Turn Away From", is set to follow on 13 August (21).
Speaking of the new track and the theme of the upcoming record, he said in a post on social media, "Starting Line discusses missing various memories."
"You're reflecting on your youth and all of the madness and craziness. It's like you're forgetting so many pieces of your life - not from vices or anything - but from the sheer volume."
"I had to figure out how to fill a lot of gaps for myself in a positive way. It's the human condition to change everything up after so long. A lot of the album deals with the idea time is slipping away from you."
Luke isn't the first member of the boy band to go solo.
5 Seconds of Summer's last studio album was 2020's "Calm".