Adult film star Stormy Daniels has taken the stand at Donald Trump's criminal hush money trial. 

She walked the jury through the US$130,000 payment she received prior to the 2016 US election to stay quiet about what went on between her and the former President.  

She detailed her alleged sexual encounter with Trump in 2006, which Trump denies.  

US Correspondent Richard Arnold told Mike Hosking that Trump's had a sour expression the whole day, and at one point appeared to mouth an expletive.  

He says the Judge often seemed taken aback by the detailed and lewd nature of Daniels' testimony. 

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