Margot Robbie has apparently taken up a sideline as a tattoo artist to get in practice for her role in Suicide Squad.

The Wolf Of Wall Street star has been pictured in costume as her DC Comics movie character Harley Quinn, tattooing “SKWAD” on someone’s forearm, thought to be director David Ayer.

Cast mates Will Smith, Jai Courtney, Joel Kinnaman and Suicide Squad director David have apparently all got matching “Skwad” tattoos, and Margot’s character has her own tattoo parlour in the movie.

Joel also shared a snap of Will Smith doing his tattoo for him.

Suicide Squad is Warner Bros’ rival to Marvel’s Avengers, about a team of supervillains, and also stars Cara Delevingne, Jared Leto, Viola Davis and Adewale Akinnuoye-Agbaje.

Jared will play The Joker, Will has been cast as Deadshot, Cara will play Enchantress, while Jai is taking on the role of Captain Boomerang and Joel is Rick Flagg.

Adewale will portray Killer Croc, and Viola will play Amanda Waller.

Suicide Squad will be released in cinemas in August 2016.