Margot Robbie's Harley Quinn showed off her tattoing skills as she inked the word "Skwad" on "Suicide Squad" director David Ayer's forearm.

The whole session was captured in a snap and shared by the director David Ayer on his Twitter, which he captioned with the hashtag, "#skwad."

One fan referrenced Margot Robbie's character as Harley Quinn in "Suicide Squad" when he commented, "I would not trust her with a needle."

Another said, "ummmm man they must have loved filming together."

A fan commented on the perfect choice of Margot Robbie as Harley Quinn in "Suicide Squad," as he said, "everyone remember how we never doubted chris hemsworth would be the best thor? margot as harley is the same :)"

Tattoing the word "Skwad" has become some sort of tradition for the cast.

Actor Jai Courtney, who plays Captain Boomerang in "Suicide Squad," also sported a similar ink on his forearm as he shared on his Instagram, which he captioned, "#skwad #harleystattooparlour."

That prompted a female fan to comment, "I wonder how many women will get this exact tattoo now @jaicourtney."

"Robocop" actor Joel Kinnaman (Rick Flagg) also showed off his "Skwad" tattoo on his left bicep as inked by Will Smith, aka Deadshot. Olivia Munn's ex quipped on his Instagram, "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."

It seemed like Margot Robbie is channeling Harley Quinn again as she appeared to have "opened" a tattoo parlour just for the ocassion. A photo of the sign was shared by "Suicide Squad" director David Ayer on Twitter which amusingly mispelled the word "parlour" into "parler."

A fan quipped, "So this is how Joker got all his tattoos."

The first photo of Jared Leto sporting tattoos as he plays Joker in "Suicide Squad" drew mixed reactions as some fans, who haven't followed the comics religiously, couldn't understand while Batman's archnemesis would have green hair and covered in ink.