Margot Robbie has revealed she put Amsterdam director David O. Russell to sleep during a scene after he asked her to read her lines 'like you just took three Xanax'.

The actress, 32, stars in the flick as Valerie Voss, a nurse who gets caught up in the murder of a US senator in the 1930s. 

Speaking to BBC Radio 1's , she said: 'One day, he made me come in to read like 40 pages of dialogue. 

'I start to read and he says "no no no, more calm, more relaxed". So I did it again…and he was like "no, no no. I want you to read it like you just took three Xanax".'

Margot added that she was concerned how long it would take her to read so many pages in such a slow manner and was worried it was going to sound 'really boring' and wouldn't make it into the final movie.

She said: 'I thought to myself "I'm literally putting him to sleep". He was going like this [nods head as if falling asleep] so I stop and ask him if he wants me to put more energy into it. 

'And he goes "No! You're doing it perfectly". And so I did the whole thing until he was fully asleep and snoring!'

Margot said that David 'refused to give in and say that he'd fallen asleep' but that they had been recording the whole time so she suggested they watch the tape back.

She added: 'I said well we have this recorded David so let's play it back and see if you were snoring!'.

The new movie Amsterdam, which is in cinemas on Friday, sees Christian Bale, John David Washington and Margot Robbie play friends who are reunited years later and accused of murder. 

Along with Margot, the film stars Rami Malek, Christian Bale, Tenet's John David Washington, Anya Taylor-Joy, Robert De Niro, Chris Rock, valiium usa and Grammy award-winner, Taylor Swift.