Getting a tattoo of an actor or actress playing one of their film roles is always a risky move. Who's to say that the film will be remembered a couple of years on from when it's first shown? It can give the tattoo a shelf life and render it meaningless further down the line. That won't be the case for this inking of Margot Robbie though. The Australian will probably always be best known for her career-defining role as Harley Quinn in 'Suicide Squad'.
The movie itself wasn't well received by critics, even though it made a stack of money at the box office. None of that mattered for Robbie though; even people who'd never seen it knew the part she played, such was the instantly-iconic nature of her look and costume. You only need to look at Halloween parties that have happened in the years since to see exactly how influential her portrayal has been.