'Dun-Dun!' Stephen Jack's Biceps Are Busting Out of His Shirt on the Set of 'Law & Order'

"Dun-Dun!" Stephen Jack's (known as Stephen Jaxx) biceps are busting out of his blue shirt on the set of "Law & Order."

In a post that's filled with photos from his filming experience, Jack shares: A mirror selfie, a selfie with the show-branded director's chair, a smiling selfie from when his costume included a police vest, two side-by-side fit pics, selfies with well-known actors from the show, and photos from on-set that highlight how wide his shoulders look and how undeniably strong his biceps are.

"That's a Wrap on my 4th Season of 'Law & Order'!" the fitness fanatic and actor – who also plays Loretta's (played by Meryl Streep) potential love interest and co-star, Jack Jonk, on murder mystery "Only Murders in the Building" – posts, before joking that he's "not 'Dun-DUN' yet!" We can't wait to see him in action when the episode airs, especially considering the "Law & Order" costuming team really made sure to accentuate all his muscles.

Scroll down to enjoy some more fantastic thirst traps from the actor, including more steamy mirror selfies, and thirst traps that showcase Jack's abs and chest hair.