'Suicide Squad' spoilers news: Margot Robbie on Harley's relationship with the Joker; Will Smith on Deadshot's weakness

One of the things DC fans are looking forward to most in the upcoming "Suicide Squad" film is the live-action cinematic debut of fan-favorite comic book character Harley Quinn.

The fictional villainess will be portrayed on the big screen for the first time by Margot Robbie. In an interview for her cover story in the August 2016 issue of Vanity Fair, the Australian actress spoke about Harley and the character's relationship with the Joker. Robbie also revealed the unique skills that Harley employs to take down her enemies.

"She loves causing mayhem and destruction," the actress said of her "Suicide Squad" character. "She's incredibly devoted to the Joker. They have a dysfunctional relationship, but she loves him anyway."

"She used to be a gymnast — that's her skill set when fighting," she added.

The trailer for "Suicide Squad" has already teased Harley's skills, showing the supervillain hanging from her prison cell's ceiling. Aside from being a skilled gymnast, in the DC Comics, Harley is also a trained psychiatrist.

The 1994 graphic novel "Mad Love" detailed Harley's origin and how she went from being an Arkham Asylum psychiatrist to the Joker's accomplice and girlfriend. The relationship between Harley and the Joker has also been teased in the trailer for "Suicide Squad," though it remains unclear how much of the couple's storyline in the comics has been adapted for the film.

Meanwhile, Will Smith, who plays assassin Deadshot, recently spoke about why he, one of Hollywood's biggest stars, agreed to take on the role in "Suicide Squad," an ensemble film.

According to Smith, he joined "Suicide Squad" because he wanted to work with director David Ayer and because he wanted to do something he had not done before.

"I had never played a character that legitimately didn't give a f—," Smith told Entertainment Weekly. "It's very freeing not having to carry the moral spine of the movie."

The actor also spoke about his "Suicide Squad" character, revealing one of Deadshot's central dilemmas.

"His Achilles heel is his daughter," he said. "He loves this little girl and that creates this bizarre conflicting mindset where he enjoys killing people but that's something this little girl doesn't want from him. She wants a daddy."

"Suicide Squad" hits theaters Aug. 5.