The Hollywood star, 41, shared a series of before and after snaps, one from June last year and one from February.
While he’s still pretty buff in the former, the latter sees a lot more definition on his abs, making him look like a washboard.
“8 months of work but I got there. June 2020 – February 2021 ”, he proudly captioned the photos,“ I will not bother to put statistics because the judges will judge only. #Fbf # near42. ”
Friends and celebrity fans quickly praised Luke’s dedication and discipline.
Kelvin Fletcher shared a series of raised hands emojis, while Alan Carr wrote, “Looking for good love! ”
He’s shared workout updates over the past eight months, handing out workout inspiration with a few sweaty ab snaps.
“Home gym workout is so awesome…” he sarcastically captioned a topless snap, alongside angry face emojis.
And in another set, a tank top Luke draped chains around his neck to add weight to painful squats.
And in yet another, he lay exhausted on the ground, surrounded by weights.
Luke recently had molds taken from his teeth for his role in the upcoming live-action remake of Pinocchio.
He will play villainous Coachman, his second Disney villain role after playing Gaston in Beauty and the Beast opposite Emma Watson.
The same maker of special effects teeth, Chris Lyons, had worked with Luke for this role, as well as his lead role in Dracula Untold.
Meanwhile, he returned to UK television last year with The Pembrokeshire Murders on ITV, playing the sleuth on the heels of the real killer.