Jon Hamm credits ‘dedicated nippleologist’ for fake ‘Fargo’ piercings

They didn’t have to needle him to pierce his fake nipples.

Ahead of Tuesday’s premiere of the fifth season of FX’s “Fargo,” Jon Hamm shared some behind-the-scenes secrets about his character, North Dakota sheriff Roy Tillman.

“I had to have some very blue latex put on my nipples, and then they cast a resoundingly lifelike pair of nipples, which they then pierced and placed over my own nipples, and we shot said nipples,” Hamm, 52, explained as part of a premiere screening and panel discussion on Nov. 15, Variety reports.

“The crew doesn’t get enough credit, but there was a dedicated nippleologist,” he added.

Hamm said he was fine to wear the artificial accessory if that meant making showrunner Noah Hawley, 56, happy.

“Noah had a pretty great sense of who this character was, and I was on board with going on that journey with him. It was fun,” he said at the panel, according to The Hollywood Reporter.

Season 5 of “Fargo,” which will stream on Hulu, also stars Juno Temple, Jennifer Jason Leigh, Joe Keery and Lamorne Morris.

The Post has contacted Hamm reps for comment.

Off-screen, Hamm married his “Mad Men” co-star Anna Osceola, 35, in June after nearly three years of dating.

He has been booked to play Coach Carr in the film adaptation of Tina Fey’s “Mean Girls: The Musical,” which hits theaters on Jan. 12.