Margot Robbie partied with Britain's Prince Harry - but had no idea who he was.

Margot Robbie

Margot Robbie

The 'Suicide Squad' star was pictured in a photobooth with the 31-year-old prince, Cara Delevingne, Sienna Miller and Suki Waterhouse at a house party, but admits she had no clue she was with royalty until half an hour later.

She told Entertainment Tonight: "I didn't know it was him for about half an hour talking to him. Suki was having a housewarming party. I was like, 'I'll pop in for 10 minutes.' About six hours later the photo booth happened."

Meanwhile, a source previously revealed the Prince and Suki looked "particularly close" at the party.

They said at the time: "It was Suki's party and they gave each other a big hug when they saw each other. Harry seemed completely interested in what she had to say. She was very bubbly and loud while he seemed to be enjoying her zaniness and free-spirited nature.

"Everyone was talking about how Suki and Harry seemed particularly close, some even said there was the start of a romance brewing. Suki fits the bill as to what he seems to like in a girl - bubbly, blonde and posh."

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