Irish MMA fighter Conor McGregor has posed nude for ESPN magazine's upcoming Body Issue, and a new set of images from behind the scenes show off almost every inch of the UFC Featherweight Champion's chiseled, tatted-up body.

The magazine's eighth Body Issue features a diverse range of athletes shedding their clothes, including Chicago Cubs pitcher Jake Arrieta, trans duathlete Chris Mosier, and out Olympic diving gold medalist Greg Louganis.

McGregor is known for his aggressive posturing tactics and being one of the biggest pay-per-view draws in television history. As he stands in the buff sparring with a punching bag in the behind-the-scenes video below, it's not hard to see why this man draws such a crowd.

"I tell you what, them Irish genes are good," the 27-year-old proudly proclaims.

"They've served me well. We are made tough. We are made of steel. So I have no doubt the blood in my genes, the Irish blood in me has definitely stood me. My family's lineage, we are warriors. The McGregor clan, we are warriors all through. We are famous all through the world for our fighting capabilities of all generations. So I have no doubt that's stood to me and that led me down this path and gave me what I have."

Check out more from Conor's shoot below.

ESPN magazine's Body Issue drops today.