RuPaul's Drag Race star Willam Belli is in Australia for the Comedy Queens Tour.

And the entertainer, who also featured in documentary Wig, has mocked Nicole Kidman's tresses in the HBO series Big Little Lies.

The 36-year-old said the Australian actress' wig is 'the biggest and worst lie' as 'there's not even a hint of scalp.'

EXCLUSIVE: 'There's not even a hint of scalp': RuPaul's Drag Race star Willam Belli (left), 36, told Daily Mail Australia that Nicole Kidman's wig in Big Little Lies is 'the biggest and worst lie'

Unimpressed by Nicole's red shoulder-length locks with a blunt fringe, Willam suggested Nicole, 52, shop elsewhere.

'Vanity from Wigs By Vanity have the best wigs in the business,' she said.

Meanwhile Willam, who was named in New York Magazine's Most Powerful Drag Queens list, had nothing but praise for 'close friends' Lady Gaga and Bradley Cooper.

Willam stars alongside Gaga as Emerald at the drag queen bar, in the 2018 film.

Not impressed: Willam said the Australian actress' wig does not have 'a hint of scalp' and suggested she shop at Vanity from Wigs By Vanity

Praise: Meanwhile Willam, who was named in New York Magazine's Most Powerful Drag Queens list, had nothing but praise for 'close friends' Lady Gaga and Bradley Cooper

'A Star Is Born was everything,' Willam told Daily Mail Australia. 'Gaga and Bradley, and having people you look up to laugh at your jokes, felt really good.'

'It was really validating as someone who was a failed actor, who then did RuPaul's Drag Race as a backup plan.'

Willam went on to say society has come a long way in accepting the LGBTIQ community.

Big-time role: Willam stars alongside Gaga as Emerald at the drag queen bar, in the 2018 film A Star Is Born: 'Gaga and Bradley, and having people you look up to laugh at your jokes, felt really good'

'Each generation gets more accepting which is great. I like Pride festival because we get to show up and show out. Remind people we have resilience and rainbows.'

The South Philadelphia-born star will perform her Melbourne show as part of the Comedy Queens Tour on August 23, followed by a show in Sydney on August 24 and Brisbane on August 25.

Tickets can be purchased online at In The Dark Events.