The cast of Warner Bros. "Suicide Squad" are really gunning for the title of Closest-Knit Cast. They've palled around with each other at Comic-Con International and at music festivals, and now a series of Instagram posts reveal that many key players from the DC super villain movie have decided to get matching "SKWAD" tattoos.

We saw the first pic yesterday, of Will Smith tatting up co-star Joel Kinnaman.

Got my #skwad tattoo:) Will has many many talents, tattooing is not one of them. It was like watching a drunk baby fly a helicopter. #suicidesquad #willsmith #harleystattooparlour A photo posted by Joel Kinnaman (@joelkinnaman) on

The fun didn't stop there, however. "Squad" producer Andy Horowitz posted a picture of Margot Robbie -- in full Harley Quinn gear -- giving director David Ayer his tattoo.

Our fearless leader #DavidAyer getting his #SKWAD tattoo last night at #harleystattooparlour #suicidesquad 📷 by @clayenos A photo posted by Andy Horwitz (@andyhorwitz) on

Jai Courtney, who plays Boomerang, also got inked up at "Harley's Tattoo Parlour."

#skwad #harleystattooparlour A photo posted by Jai Courtney (@jaicourtney) on

Ayer even tweeted a picture of the "sign" for Harley's Tattoo Parlour, and also cross-posted the photo of his tattoo to Twitter.

pic.twitter.com/mMWxFyG4Wt- David Ayer (@DavidAyerMovies) August 18, 2015

It seems like a good sign that a lot of the cast is enjoying the "Suicide Squad" filming experience enough to have a permanent reminder of the experience on their body. We'll hopefully find out what made the cast so enthusiastic about the picture when it opens on August 5, 2016.

(h/t MTV)