Margot Robbie says she once prank-called Prince Harry with Cara Delevingne

Margot Robbie says she prank-called Prince Harry with Cara Delevingne. Photo / AP

She is one of Hollywood's leading ladies and is known for her playful sense of humour.

And Margot Robbie has revealed she once tried to prank-call Prince Harry, according to the Daily Mail.

The actress, 27, confessed she was spurred on by her pal Cara Delevingne, who handed her his phone number while the duo were filming Suicide Squad back in 2016.

She told The Sun on Sunday: 'Cara knows Harry and while we were filming Suicide Squad she was like, 'Let's prank-call him'.

"I said, 'We can't prank-call ­royalty', but anyway we did — and he was so cool with it.

"Prince Harry is so nice - England literally has the coolest royalty in the world."

The former Neighbours star spoke previously about Harry's upcoming nuptials to Meghan Markle on The Kyle & Jackie O Show back in January.

Co-host Jackie 'O' Henderson asked the Gold Coast-born actress to confirm if she was friends with him.

"I wouldn't say we're close," she admitted.

"We see each other every so often at a party here or there, but not close friends," she continued.

"Will you be invited to the royal wedding?" Henderson continued.

"No, definitely not that close!" she insisted.

Robbie snapped a now-famous photo at a London party in 2015 alongside Prince Harry, Suki Waterhouse, Cara Delevingne and Sienna Miller.

She revealed in August the following year her and Harry had exchanged numbers, telling E! he was "pretty quick on text".

Robbie's career has gone from strength to strength since Suicide Squad, with the star being among the nominees for the Best Actress category for the upcoming Academy Awards on Sunday night for her leading role in I, Tonya.

Margot Robbie in I, Tonya. Photo / supplied

Margot trained extensively for her role in I, Tonya, and managed to perform practically all of the on-ice dance moves.

"I felt like I lived at the ice skating rink," she told Rolling Stone last year.

"Every time my alarm would go off at like 5 a.m. I'd be like, 'I can't do it again today, I'm still so bruised from yesterday!'"

Two stunt doubles were cast to perform most of the jumps, while the triple axel had to be replicated in CGI.

The star faces tough competition as she will go head-to-head in the category with; Sally Hawkins (Shape Of Water), Frances McDormand (Three Billboards Outside Ebbing), Meryl Streep (The Post) and Saoirse Ronan (Ladybird).