The Prime Minister, Malcolm Turnbull, has joined the worldwide lampooning of US President Donald Trump, roasting him over fake polls and having "a Russian guy" as a helper.

Mr Turnbull impersonated the US President at the Canberra press gallery's Midwinter Ball on Wednesday night.

In leaked audio, Mr Turnbull can be heard cracking jokes about his meeting with the President in New York last month.

"It was beautiful. It was the most beautiful putting-me-at-ease ever," Mr Turnbull told guests at the ball.