A former beauty queen has exposed Donald Trump's vile behaviour at pageants.

We’ve heard him brag about it. Now a former beauty queen has confirmed it. Donald Trump would regularly burst into pageant dressing rooms unannounced.

Tasha Dixon, Miss Arizona 2001, told US news station CBS that the Miss USA owner would often “waltz in” on the women, regardless of whether or not they were suitably clothed.

“Our first introduction to him was when we were at the dress rehearsal and half naked changing into our bikinis,” Dixon said.

“He just came strolling right in. There was no second to put a robe on or any sort of clothing or anything. Some girls were topless. Other girls were naked.”

Dixon also told the station that the women would also “have the pressure of the people that worked for him telling us to go fawn all over him, go walk up to him, talk to him, get his attention.”

Sadly it’s not a surprise. Audio of Trump speaking to US radio host Howard Stern was uncovered from 2005, in which the Republican presidential nominee can be heard describing how he exploited his position to leer at the semi-dressed contestants.

“I’ll go backstage before a show and everyone’s getting dressed and ready and everything else. And you know, no men are anywhere. And I’m allowed to go in because I’m the owner of the pageant. And therefore, I’m inspecting it. You know I’m inspecting it. I want to make sure everything is good,” Trump said, according to CBS.

“You know they’re standing there with no clothes. Is everybody OK? And you see these incredible looking women. And so I sort of get away with things like that.”

Donald Trump used to "get away" with walking though women's dressing rooms. Image: Getty.

Dixon's confirmation adds to the mounting pile of allegations of sexist and predatory behaviour, and follows the release of footage last week in which the 70-year-old father of five can be heard bragging about how he would "grab [women] by the pussy".

"You know I’m automatically attracted to beautiful... I just start kissing them," he was recorded saying to Access Hollywood host Billy Bush.  "It’s like a magnet. Just kiss. I don’t even wait. And when you’re a star they let you do it. You can do anything. Grab them by the pussy."

Trump issued a public apology for his so-called "locker room" banter, but not before immense public backlash - some of which came from inside his own party (a number of high profile Republicans have withdrawn their support and several major campaign donors pulled funds).

With just weeks until the election, Democratic nominee Hilary Clinton is ahead in the polls, and according to The New York Times' analysis currently has an 88 per cent chance of winning the presidency.