Margot Robbie says the best part of her job is being able to help out her family financially

Speaking to Stylist magazine, Margot explained: "It's literally the best part of the job, 1000 per cent. But it's also a really weird position.

"Someone that has been in the industry longer than me explained it. They said, 'It's like giving out medicine and too much is not going to help, you could end up killing someone by overdosing them, you need to give them enough to achieve what they need at that moment.'

I asked, 'But how do you know?' There is no perfect way of doing it, it's just something to be aware of."

Margot, 26, and her family weren't well off when she was growing up, and she is very aware of how much things cost and won't waste money.

Margot said: "I grew up in a family where you can't leave food on your plate so that would make me anxious."

Explaining how she still loves a bargain, she added: "When I see something like 'half price drinks' I am like, 'Brilliant we should get twice as many of them.'"

One drawback of being an in-demand actress though is that the 'Legend of Tarzan' star doesn't get to see enough of her family, especially her mother Sarie.

Asked how much time she gets with her beloved mum, the Australian starlet said: "Nowhere near enough, I get snippets of a phone call. In 10 years I don't want to look back and think I missed anything important, so if that means getting on a plane and flying for two days to spend 18 hours at home I'd rather do that."

She is so serious about spending time with her family she has specific days off written into her contract.

She revealed: "I get it written into my contract because if you just ask for the days off they say, 'Well we'll lose $50,000 if you do that,' and obviously you don't want to be the d**k who's like, 'Sure, I don't care if you lose $50,000.' "